SnoMan

On Fri, 06 Jul 2007 09:04:28 -0700, jimmy3stix@comcast.net wrote:

>On Jul 6, 11:54 am, "Earle Horton" <el_anglo_burg...@usa.com> wrote:
>> The first thing to check is the ignition system, because components are
>> cheap and easy to replace or inspect. Plug wires can do this. You would
>> feel silly working on a carburetor all day, and then finding out you had a
>> cracked distributor cap.
>>
>> Which engine do you have?
>>
>> Saludos cordiales,
>>
>> Earle
>>
>> <jimmy3s...@comcast.net> wrote in message
>>
>> news:1183736977.741464.193660@g4g2000hsf.googlegro ups.com...
>>
>> > Recently driving back from NH my car backfired twice (travelling about
>> > 70mph) and then died. I pulled off road and whan I restarted it it
>> > back fired so loud it blew the muffler. Service guy said it was a
>> > fuel problem as it was blowing un spent fuel out the exhaust. I did a
>> > carb rebuild and it starts fine and runs for about ten seconds and
>> > dies, again with the same fuel problem. Seems to be flooded. Any one
>> > have any ideas. I have heard everything from fuel pump to timing to
>> > ignition module and various other causes. Not sure if I should
>> > purchase a new carb or if it something else, perhaps the catalytic
>> > converter.
>>
>> > Thanks for any help.
>>
>> > Jim
>>
>> --
>> Posted via a free Usenet account fromhttp://www.teranews.com
>
>Engine is 4.9L V8. Wires, plugs and distributer cap replaced about
>3000 miles ago. Car was running fine up until that point, however I
>had just refueled 30 miles previous after letting fuel run too low
>(gauge is tempermental). Thought I may have picked up a vapor lock
>along the way. I will pull the plugs tonight though and look for any
>tell tale signs.


The first thing to figure out here is if it is leaning out or
flooding. Lean mixtures tend to backfire on that engine which BTW is a
5.9 AMC V8 not a 4.9. I tend to suspect the fuel pump here and it
should be easy to figure out if it is flooding out because there will
be a lot of gas pouring in when it dies out. If it is leaning out and
dying there will not even be any fuel for accelerator pump if you pump
it a few times because bowl will be dry. (it will squirt first time
but not much after that) This is not a ignition wire or plug problem.
If fuel system checks out the next thing would be the ignition control
module. BTW I have owned a AMC 360 for 22 years and counting and I
know that engine well.
-----------------
TheSnoMan.com

SnoMan

On Fri, 06 Jul 2007 09:04:28 -0700, jimmy3stix@comcast.net wrote:

>On Jul 6, 11:54 am, "Earle Horton" <el_anglo_burg...@usa.com> wrote:
>> The first thing to check is the ignition system, because components are
>> cheap and easy to replace or inspect. Plug wires can do this. You would
>> feel silly working on a carburetor all day, and then finding out you had a
>> cracked distributor cap.
>>
>> Which engine do you have?
>>
>> Saludos cordiales,
>>
>> Earle
>>
>> <jimmy3s...@comcast.net> wrote in message
>>
>> news:1183736977.741464.193660@g4g2000hsf.googlegro ups.com...
>>
>> > Recently driving back from NH my car backfired twice (travelling about
>> > 70mph) and then died. I pulled off road and whan I restarted it it
>> > back fired so loud it blew the muffler. Service guy said it was a
>> > fuel problem as it was blowing un spent fuel out the exhaust. I did a
>> > carb rebuild and it starts fine and runs for about ten seconds and
>> > dies, again with the same fuel problem. Seems to be flooded. Any one
>> > have any ideas. I have heard everything from fuel pump to timing to
>> > ignition module and various other causes. Not sure if I should
>> > purchase a new carb or if it something else, perhaps the catalytic
>> > converter.
>>
>> > Thanks for any help.
>>
>> > Jim
>>
>> --
>> Posted via a free Usenet account fromhttp://www.teranews.com
>
>Engine is 4.9L V8. Wires, plugs and distributer cap replaced about
>3000 miles ago. Car was running fine up until that point, however I
>had just refueled 30 miles previous after letting fuel run too low
>(gauge is tempermental). Thought I may have picked up a vapor lock
>along the way. I will pull the plugs tonight though and look for any
>tell tale signs.


The first thing to figure out here is if it is leaning out or
flooding. Lean mixtures tend to backfire on that engine which BTW is a
5.9 AMC V8 not a 4.9. I tend to suspect the fuel pump here and it
should be easy to figure out if it is flooding out because there will
be a lot of gas pouring in when it dies out. If it is leaning out and
dying there will not even be any fuel for accelerator pump if you pump
it a few times because bowl will be dry. (it will squirt first time
but not much after that) This is not a ignition wire or plug problem.
If fuel system checks out the next thing would be the ignition control
module. BTW I have owned a AMC 360 for 22 years and counting and I
know that engine well.
-----------------
TheSnoMan.com

SnoMan

On Fri, 06 Jul 2007 09:04:28 -0700, jimmy3stix@comcast.net wrote:

>On Jul 6, 11:54 am, "Earle Horton" <el_anglo_burg...@usa.com> wrote:
>> The first thing to check is the ignition system, because components are
>> cheap and easy to replace or inspect. Plug wires can do this. You would
>> feel silly working on a carburetor all day, and then finding out you had a
>> cracked distributor cap.
>>
>> Which engine do you have?
>>
>> Saludos cordiales,
>>
>> Earle
>>
>> <jimmy3s...@comcast.net> wrote in message
>>
>> news:1183736977.741464.193660@g4g2000hsf.googlegro ups.com...
>>
>> > Recently driving back from NH my car backfired twice (travelling about
>> > 70mph) and then died. I pulled off road and whan I restarted it it
>> > back fired so loud it blew the muffler. Service guy said it was a
>> > fuel problem as it was blowing un spent fuel out the exhaust. I did a
>> > carb rebuild and it starts fine and runs for about ten seconds and
>> > dies, again with the same fuel problem. Seems to be flooded. Any one
>> > have any ideas. I have heard everything from fuel pump to timing to
>> > ignition module and various other causes. Not sure if I should
>> > purchase a new carb or if it something else, perhaps the catalytic
>> > converter.
>>
>> > Thanks for any help.
>>
>> > Jim
>>
>> --
>> Posted via a free Usenet account fromhttp://www.teranews.com
>
>Engine is 4.9L V8. Wires, plugs and distributer cap replaced about
>3000 miles ago. Car was running fine up until that point, however I
>had just refueled 30 miles previous after letting fuel run too low
>(gauge is tempermental). Thought I may have picked up a vapor lock
>along the way. I will pull the plugs tonight though and look for any
>tell tale signs.


The first thing to figure out here is if it is leaning out or
flooding. Lean mixtures tend to backfire on that engine which BTW is a
5.9 AMC V8 not a 4.9. I tend to suspect the fuel pump here and it
should be easy to figure out if it is flooding out because there will
be a lot of gas pouring in when it dies out. If it is leaning out and
dying there will not even be any fuel for accelerator pump if you pump
it a few times because bowl will be dry. (it will squirt first time
but not much after that) This is not a ignition wire or plug problem.
If fuel system checks out the next thing would be the ignition control
module. BTW I have owned a AMC 360 for 22 years and counting and I
know that engine well.
-----------------
TheSnoMan.com

SnoMan

On Fri, 06 Jul 2007 12:13:57 -0400, Mike Romain <romainm@sympatico.ca>
wrote:

>Even if something like the float stuck, it wouldn't matter above 50 mph.

Spoken by a truely cluelss guy. On a AMC 360 if float is stuck you
will know it at 30, 50 or 70 unless maybe your are WOT but then it
would smoke black some and maybe load up a bit. That fuel pump can
move a lor of fuel and it can easily flood engine at 50 MPH if float
is sticking.

Stick to doing burnouts in reverse to relieve drive line wrap up in
4x4 with your 3.31 power gears and stay away from engines you really
know nothing about. You are a real jewel Mike R, a legend in your own
mind.
-----------------
TheSnoMan.com

SnoMan

On Fri, 06 Jul 2007 12:13:57 -0400, Mike Romain <romainm@sympatico.ca>
wrote:

>Even if something like the float stuck, it wouldn't matter above 50 mph.

Spoken by a truely cluelss guy. On a AMC 360 if float is stuck you
will know it at 30, 50 or 70 unless maybe your are WOT but then it
would smoke black some and maybe load up a bit. That fuel pump can
move a lor of fuel and it can easily flood engine at 50 MPH if float
is sticking.

Stick to doing burnouts in reverse to relieve drive line wrap up in
4x4 with your 3.31 power gears and stay away from engines you really
know nothing about. You are a real jewel Mike R, a legend in your own
mind.
-----------------
TheSnoMan.com

SnoMan

On Fri, 06 Jul 2007 12:13:57 -0400, Mike Romain <romainm@sympatico.ca>
wrote:

>Even if something like the float stuck, it wouldn't matter above 50 mph.

Spoken by a truely cluelss guy. On a AMC 360 if float is stuck you
will know it at 30, 50 or 70 unless maybe your are WOT but then it
would smoke black some and maybe load up a bit. That fuel pump can
move a lor of fuel and it can easily flood engine at 50 MPH if float
is sticking.

Stick to doing burnouts in reverse to relieve drive line wrap up in
4x4 with your 3.31 power gears and stay away from engines you really
know nothing about. You are a real jewel Mike R, a legend in your own
mind.
-----------------
TheSnoMan.com

SnoMan

On Fri, 06 Jul 2007 12:13:57 -0400, Mike Romain <romainm@sympatico.ca>
wrote:

>Even if something like the float stuck, it wouldn't matter above 50 mph.

Spoken by a truely cluelss guy. On a AMC 360 if float is stuck you
will know it at 30, 50 or 70 unless maybe your are WOT but then it
would smoke black some and maybe load up a bit. That fuel pump can
move a lor of fuel and it can easily flood engine at 50 MPH if float
is sticking.

Stick to doing burnouts in reverse to relieve drive line wrap up in
4x4 with your 3.31 power gears and stay away from engines you really
know nothing about. You are a real jewel Mike R, a legend in your own
mind.
-----------------
TheSnoMan.com

Mike Romain

jimmy3stix@comcast.net wrote:
> On Jul 6, 12:13 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> jimmy3s...@comcast.net wrote:
>>> Recently driving back from NH my car backfired twice (travelling about
>>> 70mph) and then died. I pulled off road and whan I restarted it it
>>> back fired so loud it blew the muffler. Service guy said it was a
>>> fuel problem as it was blowing un spent fuel out the exhaust. I did a
>>> carb rebuild and it starts fine and runs for about ten seconds and
>>> dies, again with the same fuel problem. Seems to be flooded. Any one
>>> have any ideas. I have heard everything from fuel pump to timing to
>>> ignition module and various other causes. Not sure if I should
>>> purchase a new carb or if it something else, perhaps the catalytic
>>> converter.
>>> Thanks for any help.
>>> Jim
>> I think spark. The fuel is there for sure.
>>
>> Even if something like the float stuck, it wouldn't matter above 50 mph.
>>
>> Was it raining? Maybe a splash of water got the distributor cap and
>> cracked it.
>>
>> You can do a base check for the timing chain having jumped by putting it
>> on the timing mark on the crank and seeing if the rotor is pointing real
>> close to # 1 under the distributor cap. It should be 'just' after
>> center on the pin.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>> (More Off Road album links at bottom of the view page)- Hide quoted text -
>>
>> - Show quoted text -
>
> No rain, dry as a bone. I will check timing and spark conditions.
> Maybe I should replace the float as I did not do that with the
> rebuild, althoughyou said it should not matter at the rate of speed i
> was travelling.
>
> Thanks to all for your help. I guess I know how I will be spending
> tomorrow.
>
> Jim
>

You can check the float if you want, but if the float is stuck, the
sucker won't be starting up 'easily' at all, it will flood out and stay
that way.

You will also see gas pouring down the carb throat if the float is stuck.

You mentioned running out of gas? Have you opened the top of the carb
since then?

Sometimes when we run out of gas on our 80's 258's the high vacuum will
suck carbon bits out of the charcoal canister which can do strange
things inside the carb. Black chunks everywhere.

I know a few that even use a clear gas filter on the carb vent line to
stop this because they run out of gas too often.

Mike

Mike Romain

jimmy3stix@comcast.net wrote:
> On Jul 6, 12:13 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> jimmy3s...@comcast.net wrote:
>>> Recently driving back from NH my car backfired twice (travelling about
>>> 70mph) and then died. I pulled off road and whan I restarted it it
>>> back fired so loud it blew the muffler. Service guy said it was a
>>> fuel problem as it was blowing un spent fuel out the exhaust. I did a
>>> carb rebuild and it starts fine and runs for about ten seconds and
>>> dies, again with the same fuel problem. Seems to be flooded. Any one
>>> have any ideas. I have heard everything from fuel pump to timing to
>>> ignition module and various other causes. Not sure if I should
>>> purchase a new carb or if it something else, perhaps the catalytic
>>> converter.
>>> Thanks for any help.
>>> Jim
>> I think spark. The fuel is there for sure.
>>
>> Even if something like the float stuck, it wouldn't matter above 50 mph.
>>
>> Was it raining? Maybe a splash of water got the distributor cap and
>> cracked it.
>>
>> You can do a base check for the timing chain having jumped by putting it
>> on the timing mark on the crank and seeing if the rotor is pointing real
>> close to # 1 under the distributor cap. It should be 'just' after
>> center on the pin.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>> (More Off Road album links at bottom of the view page)- Hide quoted text -
>>
>> - Show quoted text -
>
> No rain, dry as a bone. I will check timing and spark conditions.
> Maybe I should replace the float as I did not do that with the
> rebuild, althoughyou said it should not matter at the rate of speed i
> was travelling.
>
> Thanks to all for your help. I guess I know how I will be spending
> tomorrow.
>
> Jim
>

You can check the float if you want, but if the float is stuck, the
sucker won't be starting up 'easily' at all, it will flood out and stay
that way.

You will also see gas pouring down the carb throat if the float is stuck.

You mentioned running out of gas? Have you opened the top of the carb
since then?

Sometimes when we run out of gas on our 80's 258's the high vacuum will
suck carbon bits out of the charcoal canister which can do strange
things inside the carb. Black chunks everywhere.

I know a few that even use a clear gas filter on the carb vent line to
stop this because they run out of gas too often.

Mike

Mike Romain

jimmy3stix@comcast.net wrote:
> On Jul 6, 12:13 pm, Mike Romain <roma...@sympatico.ca> wrote:
>> jimmy3s...@comcast.net wrote:
>>> Recently driving back from NH my car backfired twice (travelling about
>>> 70mph) and then died. I pulled off road and whan I restarted it it
>>> back fired so loud it blew the muffler. Service guy said it was a
>>> fuel problem as it was blowing un spent fuel out the exhaust. I did a
>>> carb rebuild and it starts fine and runs for about ten seconds and
>>> dies, again with the same fuel problem. Seems to be flooded. Any one
>>> have any ideas. I have heard everything from fuel pump to timing to
>>> ignition module and various other causes. Not sure if I should
>>> purchase a new carb or if it something else, perhaps the catalytic
>>> converter.
>>> Thanks for any help.
>>> Jim
>> I think spark. The fuel is there for sure.
>>
>> Even if something like the float stuck, it wouldn't matter above 50 mph.
>>
>> Was it raining? Maybe a splash of water got the distributor cap and
>> cracked it.
>>
>> You can do a base check for the timing chain having jumped by putting it
>> on the timing mark on the crank and seeing if the rotor is pointing real
>> close to # 1 under the distributor cap. It should be 'just' after
>> center on the pin.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>> (More Off Road album links at bottom of the view page)- Hide quoted text -
>>
>> - Show quoted text -
>
> No rain, dry as a bone. I will check timing and spark conditions.
> Maybe I should replace the float as I did not do that with the
> rebuild, althoughyou said it should not matter at the rate of speed i
> was travelling.
>
> Thanks to all for your help. I guess I know how I will be spending
> tomorrow.
>
> Jim
>

You can check the float if you want, but if the float is stuck, the
sucker won't be starting up 'easily' at all, it will flood out and stay
that way.

You will also see gas pouring down the carb throat if the float is stuck.

You mentioned running out of gas? Have you opened the top of the carb
since then?

Sometimes when we run out of gas on our 80's 258's the high vacuum will
suck carbon bits out of the charcoal canister which can do strange
things inside the carb. Black chunks everywhere.

I know a few that even use a clear gas filter on the carb vent line to
stop this because they run out of gas too often.

Mike