Ping revisited
05-31-2004, 01:51 PM
#41
Guest
Posts: n/a
Re: Ping revisited
You could maybe have had the timing not advancing right from the open
port. Have you tried it with the vacuum fixed up?
You are not describing a timing ping though. Pinging or spark knock
happens under load, the more load the more knock. It is the gas pre
igniting in the cylinders.
Having a 'rattle' or knock when you get lightly on the pedal is a loose
part, loose exhaust, loose something. A loose rod bearing cap can act
like that.
My stethoscope recommendation still stands....
The carter does have an adjustment inside for the gas metering rods. I
find when the are not right, the acceleration doesn't match up with the
gas pedal. Open too much and the best acceleration is at say 3/4 of the
way down on the pedal. Not enough and you don't get full power at full
throttle.
Mike
KurtS wrote:
>
> Sorry for taking so long to get back into the conversation I started. Life
> is busy right now...
>
> The knock sensor was my next guess. I actually had time to really dig into
> the thing this weekend and found that the shop had a really screwy idea
> about proper vac line reconnection, even with the diagram I gave them before
> the work started. I found the distributor hooked up to ported vacuum and the
> manifold vac nipple wide open. A couple of others were just hanging loose.
> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>
> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> things go from here.
>
> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> the time at cruise - only when I goosed it a *little*. I'd give it more
> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> just most frequent in the pedal range that was *just* past where cruising
> speed sits.
>
> Someone mentioned jet size as a possible problem. I didn't realize Carter
> BBDs have optional sizes available. Who sells them? I thought I'd check it
> out if I end up tearing the carb apart.
>
> > From: bllsht <nospam@invaliddot.net>
> > Reply-To: nospam@dot.net
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Tue, 04 May 2004 22:38:05 -0700
> > Subject: Re: Ping revisited
> >
> > IF you're setting the timing at idle speed, you're way too advanced.
> >
> > Set it to 9 degrees with the vac advance hose disconnected and plugged, vacuum
> > switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >
> > Could also be your knock sensor has gone south.
port. Have you tried it with the vacuum fixed up?
You are not describing a timing ping though. Pinging or spark knock
happens under load, the more load the more knock. It is the gas pre
igniting in the cylinders.
Having a 'rattle' or knock when you get lightly on the pedal is a loose
part, loose exhaust, loose something. A loose rod bearing cap can act
like that.
My stethoscope recommendation still stands....
The carter does have an adjustment inside for the gas metering rods. I
find when the are not right, the acceleration doesn't match up with the
gas pedal. Open too much and the best acceleration is at say 3/4 of the
way down on the pedal. Not enough and you don't get full power at full
throttle.
Mike
KurtS wrote:
>
> Sorry for taking so long to get back into the conversation I started. Life
> is busy right now...
>
> The knock sensor was my next guess. I actually had time to really dig into
> the thing this weekend and found that the shop had a really screwy idea
> about proper vac line reconnection, even with the diagram I gave them before
> the work started. I found the distributor hooked up to ported vacuum and the
> manifold vac nipple wide open. A couple of others were just hanging loose.
> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>
> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> things go from here.
>
> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> the time at cruise - only when I goosed it a *little*. I'd give it more
> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> just most frequent in the pedal range that was *just* past where cruising
> speed sits.
>
> Someone mentioned jet size as a possible problem. I didn't realize Carter
> BBDs have optional sizes available. Who sells them? I thought I'd check it
> out if I end up tearing the carb apart.
>
> > From: bllsht <nospam@invaliddot.net>
> > Reply-To: nospam@dot.net
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Tue, 04 May 2004 22:38:05 -0700
> > Subject: Re: Ping revisited
> >
> > IF you're setting the timing at idle speed, you're way too advanced.
> >
> > Set it to 9 degrees with the vac advance hose disconnected and plugged, vacuum
> > switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >
> > Could also be your knock sensor has gone south.
06-01-2004, 06:33 PM
#42
Guest
Posts: n/a
Re: Ping revisited
It's actually much better now the vac lines are correct. I put a stethoscope
on it today and didn't hear a thing (in the driveway). I'll have to rig it
so i can listen on the highway. The rattle is only noticeable after a gear
change or when giving it gas after slowing down on the highway. I CAN feel a
slight vibration as the clutch spins down when I push the clutch pedal in.
Didn't do that before they changed the clutch. I wonder...
Damnit i hate chasing gremlins.
I'll let you know what I find.
> From: Mike Romain <romainm@sympatico.ca>
> Organization: Bell Sympatico
> Newsgroups: rec.autos.makers.jeep+******
> Date: Mon, 31 May 2004 13:51:15 -0400
> Subject: Re: Ping revisited
>
> You could maybe have had the timing not advancing right from the open
> port. Have you tried it with the vacuum fixed up?
>
> You are not describing a timing ping though. Pinging or spark knock
> happens under load, the more load the more knock. It is the gas pre
> igniting in the cylinders.
>
> Having a 'rattle' or knock when you get lightly on the pedal is a loose
> part, loose exhaust, loose something. A loose rod bearing cap can act
> like that.
>
> My stethoscope recommendation still stands....
>
> The carter does have an adjustment inside for the gas metering rods. I
> find when the are not right, the acceleration doesn't match up with the
> gas pedal. Open too much and the best acceleration is at say 3/4 of the
> way down on the pedal. Not enough and you don't get full power at full
> throttle.
>
> Mike
>
> KurtS wrote:
>>
>> Sorry for taking so long to get back into the conversation I started. Life
>> is busy right now...
>>
>> The knock sensor was my next guess. I actually had time to really dig into
>> the thing this weekend and found that the shop had a really screwy idea
>> about proper vac line reconnection, even with the diagram I gave them before
>> the work started. I found the distributor hooked up to ported vacuum and the
>> manifold vac nipple wide open. A couple of others were just hanging loose.
>> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>>
>> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
>> things go from here.
>>
>> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
>> the time at cruise - only when I goosed it a *little*. I'd give it more
>> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
>> just most frequent in the pedal range that was *just* past where cruising
>> speed sits.
>>
>> Someone mentioned jet size as a possible problem. I didn't realize Carter
>> BBDs have optional sizes available. Who sells them? I thought I'd check it
>> out if I end up tearing the carb apart.
>>
>>> From: bllsht <nospam@invaliddot.net>
>>> Reply-To: nospam@dot.net
>>> Newsgroups: rec.autos.makers.jeep+******
>>> Date: Tue, 04 May 2004 22:38:05 -0700
>>> Subject: Re: Ping revisited
>>>
>>> IF you're setting the timing at idle speed, you're way too advanced.
>>>
>>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
>>> vacuum
>>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
>>>
>>> Could also be your knock sensor has gone south.
on it today and didn't hear a thing (in the driveway). I'll have to rig it
so i can listen on the highway. The rattle is only noticeable after a gear
change or when giving it gas after slowing down on the highway. I CAN feel a
slight vibration as the clutch spins down when I push the clutch pedal in.
Didn't do that before they changed the clutch. I wonder...
Damnit i hate chasing gremlins.
I'll let you know what I find.
> From: Mike Romain <romainm@sympatico.ca>
> Organization: Bell Sympatico
> Newsgroups: rec.autos.makers.jeep+******
> Date: Mon, 31 May 2004 13:51:15 -0400
> Subject: Re: Ping revisited
>
> You could maybe have had the timing not advancing right from the open
> port. Have you tried it with the vacuum fixed up?
>
> You are not describing a timing ping though. Pinging or spark knock
> happens under load, the more load the more knock. It is the gas pre
> igniting in the cylinders.
>
> Having a 'rattle' or knock when you get lightly on the pedal is a loose
> part, loose exhaust, loose something. A loose rod bearing cap can act
> like that.
>
> My stethoscope recommendation still stands....
>
> The carter does have an adjustment inside for the gas metering rods. I
> find when the are not right, the acceleration doesn't match up with the
> gas pedal. Open too much and the best acceleration is at say 3/4 of the
> way down on the pedal. Not enough and you don't get full power at full
> throttle.
>
> Mike
>
> KurtS wrote:
>>
>> Sorry for taking so long to get back into the conversation I started. Life
>> is busy right now...
>>
>> The knock sensor was my next guess. I actually had time to really dig into
>> the thing this weekend and found that the shop had a really screwy idea
>> about proper vac line reconnection, even with the diagram I gave them before
>> the work started. I found the distributor hooked up to ported vacuum and the
>> manifold vac nipple wide open. A couple of others were just hanging loose.
>> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>>
>> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
>> things go from here.
>>
>> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
>> the time at cruise - only when I goosed it a *little*. I'd give it more
>> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
>> just most frequent in the pedal range that was *just* past where cruising
>> speed sits.
>>
>> Someone mentioned jet size as a possible problem. I didn't realize Carter
>> BBDs have optional sizes available. Who sells them? I thought I'd check it
>> out if I end up tearing the carb apart.
>>
>>> From: bllsht <nospam@invaliddot.net>
>>> Reply-To: nospam@dot.net
>>> Newsgroups: rec.autos.makers.jeep+******
>>> Date: Tue, 04 May 2004 22:38:05 -0700
>>> Subject: Re: Ping revisited
>>>
>>> IF you're setting the timing at idle speed, you're way too advanced.
>>>
>>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
>>> vacuum
>>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
>>>
>>> Could also be your knock sensor has gone south.
06-01-2004, 06:33 PM
#43
Guest
Posts: n/a
Re: Ping revisited
It's actually much better now the vac lines are correct. I put a stethoscope
on it today and didn't hear a thing (in the driveway). I'll have to rig it
so i can listen on the highway. The rattle is only noticeable after a gear
change or when giving it gas after slowing down on the highway. I CAN feel a
slight vibration as the clutch spins down when I push the clutch pedal in.
Didn't do that before they changed the clutch. I wonder...
Damnit i hate chasing gremlins.
I'll let you know what I find.
> From: Mike Romain <romainm@sympatico.ca>
> Organization: Bell Sympatico
> Newsgroups: rec.autos.makers.jeep+******
> Date: Mon, 31 May 2004 13:51:15 -0400
> Subject: Re: Ping revisited
>
> You could maybe have had the timing not advancing right from the open
> port. Have you tried it with the vacuum fixed up?
>
> You are not describing a timing ping though. Pinging or spark knock
> happens under load, the more load the more knock. It is the gas pre
> igniting in the cylinders.
>
> Having a 'rattle' or knock when you get lightly on the pedal is a loose
> part, loose exhaust, loose something. A loose rod bearing cap can act
> like that.
>
> My stethoscope recommendation still stands....
>
> The carter does have an adjustment inside for the gas metering rods. I
> find when the are not right, the acceleration doesn't match up with the
> gas pedal. Open too much and the best acceleration is at say 3/4 of the
> way down on the pedal. Not enough and you don't get full power at full
> throttle.
>
> Mike
>
> KurtS wrote:
>>
>> Sorry for taking so long to get back into the conversation I started. Life
>> is busy right now...
>>
>> The knock sensor was my next guess. I actually had time to really dig into
>> the thing this weekend and found that the shop had a really screwy idea
>> about proper vac line reconnection, even with the diagram I gave them before
>> the work started. I found the distributor hooked up to ported vacuum and the
>> manifold vac nipple wide open. A couple of others were just hanging loose.
>> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>>
>> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
>> things go from here.
>>
>> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
>> the time at cruise - only when I goosed it a *little*. I'd give it more
>> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
>> just most frequent in the pedal range that was *just* past where cruising
>> speed sits.
>>
>> Someone mentioned jet size as a possible problem. I didn't realize Carter
>> BBDs have optional sizes available. Who sells them? I thought I'd check it
>> out if I end up tearing the carb apart.
>>
>>> From: bllsht <nospam@invaliddot.net>
>>> Reply-To: nospam@dot.net
>>> Newsgroups: rec.autos.makers.jeep+******
>>> Date: Tue, 04 May 2004 22:38:05 -0700
>>> Subject: Re: Ping revisited
>>>
>>> IF you're setting the timing at idle speed, you're way too advanced.
>>>
>>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
>>> vacuum
>>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
>>>
>>> Could also be your knock sensor has gone south.
on it today and didn't hear a thing (in the driveway). I'll have to rig it
so i can listen on the highway. The rattle is only noticeable after a gear
change or when giving it gas after slowing down on the highway. I CAN feel a
slight vibration as the clutch spins down when I push the clutch pedal in.
Didn't do that before they changed the clutch. I wonder...
Damnit i hate chasing gremlins.
I'll let you know what I find.
> From: Mike Romain <romainm@sympatico.ca>
> Organization: Bell Sympatico
> Newsgroups: rec.autos.makers.jeep+******
> Date: Mon, 31 May 2004 13:51:15 -0400
> Subject: Re: Ping revisited
>
> You could maybe have had the timing not advancing right from the open
> port. Have you tried it with the vacuum fixed up?
>
> You are not describing a timing ping though. Pinging or spark knock
> happens under load, the more load the more knock. It is the gas pre
> igniting in the cylinders.
>
> Having a 'rattle' or knock when you get lightly on the pedal is a loose
> part, loose exhaust, loose something. A loose rod bearing cap can act
> like that.
>
> My stethoscope recommendation still stands....
>
> The carter does have an adjustment inside for the gas metering rods. I
> find when the are not right, the acceleration doesn't match up with the
> gas pedal. Open too much and the best acceleration is at say 3/4 of the
> way down on the pedal. Not enough and you don't get full power at full
> throttle.
>
> Mike
>
> KurtS wrote:
>>
>> Sorry for taking so long to get back into the conversation I started. Life
>> is busy right now...
>>
>> The knock sensor was my next guess. I actually had time to really dig into
>> the thing this weekend and found that the shop had a really screwy idea
>> about proper vac line reconnection, even with the diagram I gave them before
>> the work started. I found the distributor hooked up to ported vacuum and the
>> manifold vac nipple wide open. A couple of others were just hanging loose.
>> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>>
>> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
>> things go from here.
>>
>> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
>> the time at cruise - only when I goosed it a *little*. I'd give it more
>> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
>> just most frequent in the pedal range that was *just* past where cruising
>> speed sits.
>>
>> Someone mentioned jet size as a possible problem. I didn't realize Carter
>> BBDs have optional sizes available. Who sells them? I thought I'd check it
>> out if I end up tearing the carb apart.
>>
>>> From: bllsht <nospam@invaliddot.net>
>>> Reply-To: nospam@dot.net
>>> Newsgroups: rec.autos.makers.jeep+******
>>> Date: Tue, 04 May 2004 22:38:05 -0700
>>> Subject: Re: Ping revisited
>>>
>>> IF you're setting the timing at idle speed, you're way too advanced.
>>>
>>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
>>> vacuum
>>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
>>>
>>> Could also be your knock sensor has gone south.
06-01-2004, 06:33 PM
#44
Guest
Posts: n/a
Re: Ping revisited
It's actually much better now the vac lines are correct. I put a stethoscope
on it today and didn't hear a thing (in the driveway). I'll have to rig it
so i can listen on the highway. The rattle is only noticeable after a gear
change or when giving it gas after slowing down on the highway. I CAN feel a
slight vibration as the clutch spins down when I push the clutch pedal in.
Didn't do that before they changed the clutch. I wonder...
Damnit i hate chasing gremlins.
I'll let you know what I find.
> From: Mike Romain <romainm@sympatico.ca>
> Organization: Bell Sympatico
> Newsgroups: rec.autos.makers.jeep+******
> Date: Mon, 31 May 2004 13:51:15 -0400
> Subject: Re: Ping revisited
>
> You could maybe have had the timing not advancing right from the open
> port. Have you tried it with the vacuum fixed up?
>
> You are not describing a timing ping though. Pinging or spark knock
> happens under load, the more load the more knock. It is the gas pre
> igniting in the cylinders.
>
> Having a 'rattle' or knock when you get lightly on the pedal is a loose
> part, loose exhaust, loose something. A loose rod bearing cap can act
> like that.
>
> My stethoscope recommendation still stands....
>
> The carter does have an adjustment inside for the gas metering rods. I
> find when the are not right, the acceleration doesn't match up with the
> gas pedal. Open too much and the best acceleration is at say 3/4 of the
> way down on the pedal. Not enough and you don't get full power at full
> throttle.
>
> Mike
>
> KurtS wrote:
>>
>> Sorry for taking so long to get back into the conversation I started. Life
>> is busy right now...
>>
>> The knock sensor was my next guess. I actually had time to really dig into
>> the thing this weekend and found that the shop had a really screwy idea
>> about proper vac line reconnection, even with the diagram I gave them before
>> the work started. I found the distributor hooked up to ported vacuum and the
>> manifold vac nipple wide open. A couple of others were just hanging loose.
>> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>>
>> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
>> things go from here.
>>
>> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
>> the time at cruise - only when I goosed it a *little*. I'd give it more
>> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
>> just most frequent in the pedal range that was *just* past where cruising
>> speed sits.
>>
>> Someone mentioned jet size as a possible problem. I didn't realize Carter
>> BBDs have optional sizes available. Who sells them? I thought I'd check it
>> out if I end up tearing the carb apart.
>>
>>> From: bllsht <nospam@invaliddot.net>
>>> Reply-To: nospam@dot.net
>>> Newsgroups: rec.autos.makers.jeep+******
>>> Date: Tue, 04 May 2004 22:38:05 -0700
>>> Subject: Re: Ping revisited
>>>
>>> IF you're setting the timing at idle speed, you're way too advanced.
>>>
>>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
>>> vacuum
>>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
>>>
>>> Could also be your knock sensor has gone south.
on it today and didn't hear a thing (in the driveway). I'll have to rig it
so i can listen on the highway. The rattle is only noticeable after a gear
change or when giving it gas after slowing down on the highway. I CAN feel a
slight vibration as the clutch spins down when I push the clutch pedal in.
Didn't do that before they changed the clutch. I wonder...
Damnit i hate chasing gremlins.
I'll let you know what I find.
> From: Mike Romain <romainm@sympatico.ca>
> Organization: Bell Sympatico
> Newsgroups: rec.autos.makers.jeep+******
> Date: Mon, 31 May 2004 13:51:15 -0400
> Subject: Re: Ping revisited
>
> You could maybe have had the timing not advancing right from the open
> port. Have you tried it with the vacuum fixed up?
>
> You are not describing a timing ping though. Pinging or spark knock
> happens under load, the more load the more knock. It is the gas pre
> igniting in the cylinders.
>
> Having a 'rattle' or knock when you get lightly on the pedal is a loose
> part, loose exhaust, loose something. A loose rod bearing cap can act
> like that.
>
> My stethoscope recommendation still stands....
>
> The carter does have an adjustment inside for the gas metering rods. I
> find when the are not right, the acceleration doesn't match up with the
> gas pedal. Open too much and the best acceleration is at say 3/4 of the
> way down on the pedal. Not enough and you don't get full power at full
> throttle.
>
> Mike
>
> KurtS wrote:
>>
>> Sorry for taking so long to get back into the conversation I started. Life
>> is busy right now...
>>
>> The knock sensor was my next guess. I actually had time to really dig into
>> the thing this weekend and found that the shop had a really screwy idea
>> about proper vac line reconnection, even with the diagram I gave them before
>> the work started. I found the distributor hooked up to ported vacuum and the
>> manifold vac nipple wide open. A couple of others were just hanging loose.
>> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>>
>> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
>> things go from here.
>>
>> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
>> the time at cruise - only when I goosed it a *little*. I'd give it more
>> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
>> just most frequent in the pedal range that was *just* past where cruising
>> speed sits.
>>
>> Someone mentioned jet size as a possible problem. I didn't realize Carter
>> BBDs have optional sizes available. Who sells them? I thought I'd check it
>> out if I end up tearing the carb apart.
>>
>>> From: bllsht <nospam@invaliddot.net>
>>> Reply-To: nospam@dot.net
>>> Newsgroups: rec.autos.makers.jeep+******
>>> Date: Tue, 04 May 2004 22:38:05 -0700
>>> Subject: Re: Ping revisited
>>>
>>> IF you're setting the timing at idle speed, you're way too advanced.
>>>
>>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
>>> vacuum
>>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
>>>
>>> Could also be your knock sensor has gone south.
06-01-2004, 06:33 PM
#45
Guest
Posts: n/a
Re: Ping revisited
It's actually much better now the vac lines are correct. I put a stethoscope
on it today and didn't hear a thing (in the driveway). I'll have to rig it
so i can listen on the highway. The rattle is only noticeable after a gear
change or when giving it gas after slowing down on the highway. I CAN feel a
slight vibration as the clutch spins down when I push the clutch pedal in.
Didn't do that before they changed the clutch. I wonder...
Damnit i hate chasing gremlins.
I'll let you know what I find.
> From: Mike Romain <romainm@sympatico.ca>
> Organization: Bell Sympatico
> Newsgroups: rec.autos.makers.jeep+******
> Date: Mon, 31 May 2004 13:51:15 -0400
> Subject: Re: Ping revisited
>
> You could maybe have had the timing not advancing right from the open
> port. Have you tried it with the vacuum fixed up?
>
> You are not describing a timing ping though. Pinging or spark knock
> happens under load, the more load the more knock. It is the gas pre
> igniting in the cylinders.
>
> Having a 'rattle' or knock when you get lightly on the pedal is a loose
> part, loose exhaust, loose something. A loose rod bearing cap can act
> like that.
>
> My stethoscope recommendation still stands....
>
> The carter does have an adjustment inside for the gas metering rods. I
> find when the are not right, the acceleration doesn't match up with the
> gas pedal. Open too much and the best acceleration is at say 3/4 of the
> way down on the pedal. Not enough and you don't get full power at full
> throttle.
>
> Mike
>
> KurtS wrote:
>>
>> Sorry for taking so long to get back into the conversation I started. Life
>> is busy right now...
>>
>> The knock sensor was my next guess. I actually had time to really dig into
>> the thing this weekend and found that the shop had a really screwy idea
>> about proper vac line reconnection, even with the diagram I gave them before
>> the work started. I found the distributor hooked up to ported vacuum and the
>> manifold vac nipple wide open. A couple of others were just hanging loose.
>> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>>
>> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
>> things go from here.
>>
>> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
>> the time at cruise - only when I goosed it a *little*. I'd give it more
>> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
>> just most frequent in the pedal range that was *just* past where cruising
>> speed sits.
>>
>> Someone mentioned jet size as a possible problem. I didn't realize Carter
>> BBDs have optional sizes available. Who sells them? I thought I'd check it
>> out if I end up tearing the carb apart.
>>
>>> From: bllsht <nospam@invaliddot.net>
>>> Reply-To: nospam@dot.net
>>> Newsgroups: rec.autos.makers.jeep+******
>>> Date: Tue, 04 May 2004 22:38:05 -0700
>>> Subject: Re: Ping revisited
>>>
>>> IF you're setting the timing at idle speed, you're way too advanced.
>>>
>>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
>>> vacuum
>>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
>>>
>>> Could also be your knock sensor has gone south.
on it today and didn't hear a thing (in the driveway). I'll have to rig it
so i can listen on the highway. The rattle is only noticeable after a gear
change or when giving it gas after slowing down on the highway. I CAN feel a
slight vibration as the clutch spins down when I push the clutch pedal in.
Didn't do that before they changed the clutch. I wonder...
Damnit i hate chasing gremlins.
I'll let you know what I find.
> From: Mike Romain <romainm@sympatico.ca>
> Organization: Bell Sympatico
> Newsgroups: rec.autos.makers.jeep+******
> Date: Mon, 31 May 2004 13:51:15 -0400
> Subject: Re: Ping revisited
>
> You could maybe have had the timing not advancing right from the open
> port. Have you tried it with the vacuum fixed up?
>
> You are not describing a timing ping though. Pinging or spark knock
> happens under load, the more load the more knock. It is the gas pre
> igniting in the cylinders.
>
> Having a 'rattle' or knock when you get lightly on the pedal is a loose
> part, loose exhaust, loose something. A loose rod bearing cap can act
> like that.
>
> My stethoscope recommendation still stands....
>
> The carter does have an adjustment inside for the gas metering rods. I
> find when the are not right, the acceleration doesn't match up with the
> gas pedal. Open too much and the best acceleration is at say 3/4 of the
> way down on the pedal. Not enough and you don't get full power at full
> throttle.
>
> Mike
>
> KurtS wrote:
>>
>> Sorry for taking so long to get back into the conversation I started. Life
>> is busy right now...
>>
>> The knock sensor was my next guess. I actually had time to really dig into
>> the thing this weekend and found that the shop had a really screwy idea
>> about proper vac line reconnection, even with the diagram I gave them before
>> the work started. I found the distributor hooked up to ported vacuum and the
>> manifold vac nipple wide open. A couple of others were just hanging loose.
>> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
>>
>> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
>> things go from here.
>>
>> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
>> the time at cruise - only when I goosed it a *little*. I'd give it more
>> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
>> just most frequent in the pedal range that was *just* past where cruising
>> speed sits.
>>
>> Someone mentioned jet size as a possible problem. I didn't realize Carter
>> BBDs have optional sizes available. Who sells them? I thought I'd check it
>> out if I end up tearing the carb apart.
>>
>>> From: bllsht <nospam@invaliddot.net>
>>> Reply-To: nospam@dot.net
>>> Newsgroups: rec.autos.makers.jeep+******
>>> Date: Tue, 04 May 2004 22:38:05 -0700
>>> Subject: Re: Ping revisited
>>>
>>> IF you're setting the timing at idle speed, you're way too advanced.
>>>
>>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
>>> vacuum
>>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
>>>
>>> Could also be your knock sensor has gone south.
06-01-2004, 07:06 PM
#46
Guest
Posts: n/a
Re: Ping revisited
I agree, strange vibes ar a major pain!
I chased one for a couple months, changed u-joints, rotated tires, had
to stop on the highway once because I thought one or more of my front
tires was going to just up and fall off the shake was that bad. It was
a bad clutch on the rad fan....
If it is maybe a lean knock, try a spray of carb cleaner or a drizzle of
water along the intake manifold gasket. They come loose lots after an
engine job.
Did you get the carb mix screws back to their base setting for the
stepper motor to work right? Someone here posted how to do it and I
saved it if you would like to see.
Basically if you look down the carb, they should be pulsing in the
middle of their travel, if they are pinned to either side, you have
other issues or the mix screws aren't set right.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
I chased one for a couple months, changed u-joints, rotated tires, had
to stop on the highway once because I thought one or more of my front
tires was going to just up and fall off the shake was that bad. It was
a bad clutch on the rad fan....
If it is maybe a lean knock, try a spray of carb cleaner or a drizzle of
water along the intake manifold gasket. They come loose lots after an
engine job.
Did you get the carb mix screws back to their base setting for the
stepper motor to work right? Someone here posted how to do it and I
saved it if you would like to see.
Basically if you look down the carb, they should be pulsing in the
middle of their travel, if they are pinned to either side, you have
other issues or the mix screws aren't set right.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
06-01-2004, 07:06 PM
#47
Guest
Posts: n/a
Re: Ping revisited
I agree, strange vibes ar a major pain!
I chased one for a couple months, changed u-joints, rotated tires, had
to stop on the highway once because I thought one or more of my front
tires was going to just up and fall off the shake was that bad. It was
a bad clutch on the rad fan....
If it is maybe a lean knock, try a spray of carb cleaner or a drizzle of
water along the intake manifold gasket. They come loose lots after an
engine job.
Did you get the carb mix screws back to their base setting for the
stepper motor to work right? Someone here posted how to do it and I
saved it if you would like to see.
Basically if you look down the carb, they should be pulsing in the
middle of their travel, if they are pinned to either side, you have
other issues or the mix screws aren't set right.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
I chased one for a couple months, changed u-joints, rotated tires, had
to stop on the highway once because I thought one or more of my front
tires was going to just up and fall off the shake was that bad. It was
a bad clutch on the rad fan....
If it is maybe a lean knock, try a spray of carb cleaner or a drizzle of
water along the intake manifold gasket. They come loose lots after an
engine job.
Did you get the carb mix screws back to their base setting for the
stepper motor to work right? Someone here posted how to do it and I
saved it if you would like to see.
Basically if you look down the carb, they should be pulsing in the
middle of their travel, if they are pinned to either side, you have
other issues or the mix screws aren't set right.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
06-01-2004, 07:06 PM
#48
Guest
Posts: n/a
Re: Ping revisited
I agree, strange vibes ar a major pain!
I chased one for a couple months, changed u-joints, rotated tires, had
to stop on the highway once because I thought one or more of my front
tires was going to just up and fall off the shake was that bad. It was
a bad clutch on the rad fan....
If it is maybe a lean knock, try a spray of carb cleaner or a drizzle of
water along the intake manifold gasket. They come loose lots after an
engine job.
Did you get the carb mix screws back to their base setting for the
stepper motor to work right? Someone here posted how to do it and I
saved it if you would like to see.
Basically if you look down the carb, they should be pulsing in the
middle of their travel, if they are pinned to either side, you have
other issues or the mix screws aren't set right.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
I chased one for a couple months, changed u-joints, rotated tires, had
to stop on the highway once because I thought one or more of my front
tires was going to just up and fall off the shake was that bad. It was
a bad clutch on the rad fan....
If it is maybe a lean knock, try a spray of carb cleaner or a drizzle of
water along the intake manifold gasket. They come loose lots after an
engine job.
Did you get the carb mix screws back to their base setting for the
stepper motor to work right? Someone here posted how to do it and I
saved it if you would like to see.
Basically if you look down the carb, they should be pulsing in the
middle of their travel, if they are pinned to either side, you have
other issues or the mix screws aren't set right.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
06-01-2004, 07:06 PM
#49
Guest
Posts: n/a
Re: Ping revisited
I agree, strange vibes ar a major pain!
I chased one for a couple months, changed u-joints, rotated tires, had
to stop on the highway once because I thought one or more of my front
tires was going to just up and fall off the shake was that bad. It was
a bad clutch on the rad fan....
If it is maybe a lean knock, try a spray of carb cleaner or a drizzle of
water along the intake manifold gasket. They come loose lots after an
engine job.
Did you get the carb mix screws back to their base setting for the
stepper motor to work right? Someone here posted how to do it and I
saved it if you would like to see.
Basically if you look down the carb, they should be pulsing in the
middle of their travel, if they are pinned to either side, you have
other issues or the mix screws aren't set right.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
I chased one for a couple months, changed u-joints, rotated tires, had
to stop on the highway once because I thought one or more of my front
tires was going to just up and fall off the shake was that bad. It was
a bad clutch on the rad fan....
If it is maybe a lean knock, try a spray of carb cleaner or a drizzle of
water along the intake manifold gasket. They come loose lots after an
engine job.
Did you get the carb mix screws back to their base setting for the
stepper motor to work right? Someone here posted how to do it and I
saved it if you would like to see.
Basically if you look down the carb, they should be pulsing in the
middle of their travel, if they are pinned to either side, you have
other issues or the mix screws aren't set right.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
06-01-2004, 07:42 PM
#50
Guest
Posts: n/a
Re: Ping revisited
I read that again.
A systematic vibe and a knock, well...
There is a cover plate on the bottom of the flywheel you can remove to
see if a bolt is backing out of the pressure plate and ticking
something.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.
A systematic vibe and a knock, well...
There is a cover plate on the bottom of the flywheel you can remove to
see if a bolt is backing out of the pressure plate and ticking
something.
Mike
KurtS wrote:
>
> It's actually much better now the vac lines are correct. I put a stethoscope
> on it today and didn't hear a thing (in the driveway). I'll have to rig it
> so i can listen on the highway. The rattle is only noticeable after a gear
> change or when giving it gas after slowing down on the highway. I CAN feel a
> slight vibration as the clutch spins down when I push the clutch pedal in.
> Didn't do that before they changed the clutch. I wonder...
> Damnit i hate chasing gremlins.
>
> I'll let you know what I find.
>
> > From: Mike Romain <romainm@sympatico.ca>
> > Organization: Bell Sympatico
> > Newsgroups: rec.autos.makers.jeep+******
> > Date: Mon, 31 May 2004 13:51:15 -0400
> > Subject: Re: Ping revisited
> >
> > You could maybe have had the timing not advancing right from the open
> > port. Have you tried it with the vacuum fixed up?
> >
> > You are not describing a timing ping though. Pinging or spark knock
> > happens under load, the more load the more knock. It is the gas pre
> > igniting in the cylinders.
> >
> > Having a 'rattle' or knock when you get lightly on the pedal is a loose
> > part, loose exhaust, loose something. A loose rod bearing cap can act
> > like that.
> >
> > My stethoscope recommendation still stands....
> >
> > The carter does have an adjustment inside for the gas metering rods. I
> > find when the are not right, the acceleration doesn't match up with the
> > gas pedal. Open too much and the best acceleration is at say 3/4 of the
> > way down on the pedal. Not enough and you don't get full power at full
> > throttle.
> >
> > Mike
> >
> > KurtS wrote:
> >>
> >> Sorry for taking so long to get back into the conversation I started. Life
> >> is busy right now...
> >>
> >> The knock sensor was my next guess. I actually had time to really dig into
> >> the thing this weekend and found that the shop had a really screwy idea
> >> about proper vac line reconnection, even with the diagram I gave them before
> >> the work started. I found the distributor hooked up to ported vacuum and the
> >> manifold vac nipple wide open. A couple of others were just hanging loose.
> >> Sheesh. Odd that it ran so smoothly for the first 1000 miles.
> >>
> >> I did have the timing set 9 deg BTDC @ 1600 so that wasn't it. We'll see how
> >> things go from here.
> >>
> >> Mike R: I think I was unclear on the ping frequency. It wasn't doing it all
> >> the time at cruise - only when I goosed it a *little*. I'd give it more
> >> pedal and the knock disappeared. Never pinged on hills or hard acceleration,
> >> just most frequent in the pedal range that was *just* past where cruising
> >> speed sits.
> >>
> >> Someone mentioned jet size as a possible problem. I didn't realize Carter
> >> BBDs have optional sizes available. Who sells them? I thought I'd check it
> >> out if I end up tearing the carb apart.
> >>
> >>> From: bllsht <nospam@invaliddot.net>
> >>> Reply-To: nospam@dot.net
> >>> Newsgroups: rec.autos.makers.jeep+******
> >>> Date: Tue, 04 May 2004 22:38:05 -0700
> >>> Subject: Re: Ping revisited
> >>>
> >>> IF you're setting the timing at idle speed, you're way too advanced.
> >>>
> >>> Set it to 9 degrees with the vac advance hose disconnected and plugged,
> >>> vacuum
> >>> switch assy electrical connector unplugged, and engine running at 1600 RPM.
> >>>
> >>> Could also be your knock sensor has gone south.