ECM for 93 YJ
04-27-2007, 01:53 PM
#31
Guest
Posts: n/a
Re: ECM for 93 YJ
You are describing a failure in the TPS to me.
The plug and socket on it get dirty and need cleaning on a regular
basis. This controls throttle response and shifting. I recommend an
electronic spray contact cleaner, but even WD40 will do in a pinch.
If you have a multimeter I can give you the electrical test info for the
TPS also.
Mike
paul wrote:
> Well - this is all related to an "assumed" tranny problem, after having much
> work ($$$) done the problem wasn't fixed - Went back to tranny shop and they
> claimed a spark or vacuum problem. I changed plugs, wires, cap, rotor, and
> even the ignition coil. no improvement. Went to a recommended service shop -
> they told me that the crack in the exhaust manifold was causing the O2
> sensor to mis-read and this created the tranny shifting problem --- well -
> after replacing the manifold there is no improvement in performance:
> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears - it
> should be like a rocket) remaining at full throttle it will wind up and not
> change gears unless foot is let off throttle. Then at highway speeds when
> trying to pass it used to rev up to 3500 rpm's with no drive train
> response - now (after second visit to tranny shop) it will not go over 60
> mph on the freeway and rpm's remain constant (although if I put it in
> neutral it will rev up).
>
> So the service shop is guesstimating that the computer is bad - but finding
> one is proving difficult - the service shop is continuing diagnosis to see
> if they can verify the computer is faulty......
>
> thanks
> paul
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>> Some folks have been told their ECM is dead after getting the emergency
>> brake recall done. There is a wire there on a bolt that is the ground for
>> the fuel pump and if the 'tech' doesn't know about it, it can be left off
>> and nothing they can do will make the pump work so they think the main ECM
>> is dead.
>>
>> The other grounds for the ECM are near the oil dipstick bolted onto the
>> block.
>>
>> It is a bit unusual to hear of a dead computer in a YJ...
>>
>> Mike
>>
>> paul wrote:
>>> Ground strap is verified, brake wires are solid.....
>>> ? ? ?
>>>
>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>> paul wrote:
>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>
>>>>> thanks
>>>>> paul
>>>> Just FYI, if the ground strap that runs from the rear of the engine head
>>>> up to the firewall goes punky, it will cause a computer failure.
>>>>
>>>> So can the recall on the emergency brake if they forget to hook up one
>>>> wire onto the bolt there.
>>>>
>>>> Mike
>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>> 88 Cherokee 235 BFG AT's
>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>> (More Off Road album links at bottom of the view page)
>
The plug and socket on it get dirty and need cleaning on a regular
basis. This controls throttle response and shifting. I recommend an
electronic spray contact cleaner, but even WD40 will do in a pinch.
If you have a multimeter I can give you the electrical test info for the
TPS also.
Mike
paul wrote:
> Well - this is all related to an "assumed" tranny problem, after having much
> work ($$$) done the problem wasn't fixed - Went back to tranny shop and they
> claimed a spark or vacuum problem. I changed plugs, wires, cap, rotor, and
> even the ignition coil. no improvement. Went to a recommended service shop -
> they told me that the crack in the exhaust manifold was causing the O2
> sensor to mis-read and this created the tranny shifting problem --- well -
> after replacing the manifold there is no improvement in performance:
> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears - it
> should be like a rocket) remaining at full throttle it will wind up and not
> change gears unless foot is let off throttle. Then at highway speeds when
> trying to pass it used to rev up to 3500 rpm's with no drive train
> response - now (after second visit to tranny shop) it will not go over 60
> mph on the freeway and rpm's remain constant (although if I put it in
> neutral it will rev up).
>
> So the service shop is guesstimating that the computer is bad - but finding
> one is proving difficult - the service shop is continuing diagnosis to see
> if they can verify the computer is faulty......
>
> thanks
> paul
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>> Some folks have been told their ECM is dead after getting the emergency
>> brake recall done. There is a wire there on a bolt that is the ground for
>> the fuel pump and if the 'tech' doesn't know about it, it can be left off
>> and nothing they can do will make the pump work so they think the main ECM
>> is dead.
>>
>> The other grounds for the ECM are near the oil dipstick bolted onto the
>> block.
>>
>> It is a bit unusual to hear of a dead computer in a YJ...
>>
>> Mike
>>
>> paul wrote:
>>> Ground strap is verified, brake wires are solid.....
>>> ? ? ?
>>>
>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>> paul wrote:
>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>
>>>>> thanks
>>>>> paul
>>>> Just FYI, if the ground strap that runs from the rear of the engine head
>>>> up to the firewall goes punky, it will cause a computer failure.
>>>>
>>>> So can the recall on the emergency brake if they forget to hook up one
>>>> wire onto the bolt there.
>>>>
>>>> Mike
>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>> 88 Cherokee 235 BFG AT's
>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>> (More Off Road album links at bottom of the view page)
>
04-27-2007, 01:53 PM
#32
Guest
Posts: n/a
Re: ECM for 93 YJ
You are describing a failure in the TPS to me.
The plug and socket on it get dirty and need cleaning on a regular
basis. This controls throttle response and shifting. I recommend an
electronic spray contact cleaner, but even WD40 will do in a pinch.
If you have a multimeter I can give you the electrical test info for the
TPS also.
Mike
paul wrote:
> Well - this is all related to an "assumed" tranny problem, after having much
> work ($$$) done the problem wasn't fixed - Went back to tranny shop and they
> claimed a spark or vacuum problem. I changed plugs, wires, cap, rotor, and
> even the ignition coil. no improvement. Went to a recommended service shop -
> they told me that the crack in the exhaust manifold was causing the O2
> sensor to mis-read and this created the tranny shifting problem --- well -
> after replacing the manifold there is no improvement in performance:
> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears - it
> should be like a rocket) remaining at full throttle it will wind up and not
> change gears unless foot is let off throttle. Then at highway speeds when
> trying to pass it used to rev up to 3500 rpm's with no drive train
> response - now (after second visit to tranny shop) it will not go over 60
> mph on the freeway and rpm's remain constant (although if I put it in
> neutral it will rev up).
>
> So the service shop is guesstimating that the computer is bad - but finding
> one is proving difficult - the service shop is continuing diagnosis to see
> if they can verify the computer is faulty......
>
> thanks
> paul
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>> Some folks have been told their ECM is dead after getting the emergency
>> brake recall done. There is a wire there on a bolt that is the ground for
>> the fuel pump and if the 'tech' doesn't know about it, it can be left off
>> and nothing they can do will make the pump work so they think the main ECM
>> is dead.
>>
>> The other grounds for the ECM are near the oil dipstick bolted onto the
>> block.
>>
>> It is a bit unusual to hear of a dead computer in a YJ...
>>
>> Mike
>>
>> paul wrote:
>>> Ground strap is verified, brake wires are solid.....
>>> ? ? ?
>>>
>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>> paul wrote:
>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>
>>>>> thanks
>>>>> paul
>>>> Just FYI, if the ground strap that runs from the rear of the engine head
>>>> up to the firewall goes punky, it will cause a computer failure.
>>>>
>>>> So can the recall on the emergency brake if they forget to hook up one
>>>> wire onto the bolt there.
>>>>
>>>> Mike
>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>> 88 Cherokee 235 BFG AT's
>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>> (More Off Road album links at bottom of the view page)
>
The plug and socket on it get dirty and need cleaning on a regular
basis. This controls throttle response and shifting. I recommend an
electronic spray contact cleaner, but even WD40 will do in a pinch.
If you have a multimeter I can give you the electrical test info for the
TPS also.
Mike
paul wrote:
> Well - this is all related to an "assumed" tranny problem, after having much
> work ($$$) done the problem wasn't fixed - Went back to tranny shop and they
> claimed a spark or vacuum problem. I changed plugs, wires, cap, rotor, and
> even the ignition coil. no improvement. Went to a recommended service shop -
> they told me that the crack in the exhaust manifold was causing the O2
> sensor to mis-read and this created the tranny shifting problem --- well -
> after replacing the manifold there is no improvement in performance:
> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears - it
> should be like a rocket) remaining at full throttle it will wind up and not
> change gears unless foot is let off throttle. Then at highway speeds when
> trying to pass it used to rev up to 3500 rpm's with no drive train
> response - now (after second visit to tranny shop) it will not go over 60
> mph on the freeway and rpm's remain constant (although if I put it in
> neutral it will rev up).
>
> So the service shop is guesstimating that the computer is bad - but finding
> one is proving difficult - the service shop is continuing diagnosis to see
> if they can verify the computer is faulty......
>
> thanks
> paul
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>> Some folks have been told their ECM is dead after getting the emergency
>> brake recall done. There is a wire there on a bolt that is the ground for
>> the fuel pump and if the 'tech' doesn't know about it, it can be left off
>> and nothing they can do will make the pump work so they think the main ECM
>> is dead.
>>
>> The other grounds for the ECM are near the oil dipstick bolted onto the
>> block.
>>
>> It is a bit unusual to hear of a dead computer in a YJ...
>>
>> Mike
>>
>> paul wrote:
>>> Ground strap is verified, brake wires are solid.....
>>> ? ? ?
>>>
>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>> paul wrote:
>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>
>>>>> thanks
>>>>> paul
>>>> Just FYI, if the ground strap that runs from the rear of the engine head
>>>> up to the firewall goes punky, it will cause a computer failure.
>>>>
>>>> So can the recall on the emergency brake if they forget to hook up one
>>>> wire onto the bolt there.
>>>>
>>>> Mike
>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>> 88 Cherokee 235 BFG AT's
>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>> (More Off Road album links at bottom of the view page)
>
04-27-2007, 01:53 PM
#33
Guest
Posts: n/a
Re: ECM for 93 YJ
You are describing a failure in the TPS to me.
The plug and socket on it get dirty and need cleaning on a regular
basis. This controls throttle response and shifting. I recommend an
electronic spray contact cleaner, but even WD40 will do in a pinch.
If you have a multimeter I can give you the electrical test info for the
TPS also.
Mike
paul wrote:
> Well - this is all related to an "assumed" tranny problem, after having much
> work ($$$) done the problem wasn't fixed - Went back to tranny shop and they
> claimed a spark or vacuum problem. I changed plugs, wires, cap, rotor, and
> even the ignition coil. no improvement. Went to a recommended service shop -
> they told me that the crack in the exhaust manifold was causing the O2
> sensor to mis-read and this created the tranny shifting problem --- well -
> after replacing the manifold there is no improvement in performance:
> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears - it
> should be like a rocket) remaining at full throttle it will wind up and not
> change gears unless foot is let off throttle. Then at highway speeds when
> trying to pass it used to rev up to 3500 rpm's with no drive train
> response - now (after second visit to tranny shop) it will not go over 60
> mph on the freeway and rpm's remain constant (although if I put it in
> neutral it will rev up).
>
> So the service shop is guesstimating that the computer is bad - but finding
> one is proving difficult - the service shop is continuing diagnosis to see
> if they can verify the computer is faulty......
>
> thanks
> paul
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>> Some folks have been told their ECM is dead after getting the emergency
>> brake recall done. There is a wire there on a bolt that is the ground for
>> the fuel pump and if the 'tech' doesn't know about it, it can be left off
>> and nothing they can do will make the pump work so they think the main ECM
>> is dead.
>>
>> The other grounds for the ECM are near the oil dipstick bolted onto the
>> block.
>>
>> It is a bit unusual to hear of a dead computer in a YJ...
>>
>> Mike
>>
>> paul wrote:
>>> Ground strap is verified, brake wires are solid.....
>>> ? ? ?
>>>
>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>> paul wrote:
>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>
>>>>> thanks
>>>>> paul
>>>> Just FYI, if the ground strap that runs from the rear of the engine head
>>>> up to the firewall goes punky, it will cause a computer failure.
>>>>
>>>> So can the recall on the emergency brake if they forget to hook up one
>>>> wire onto the bolt there.
>>>>
>>>> Mike
>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>> 88 Cherokee 235 BFG AT's
>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>> (More Off Road album links at bottom of the view page)
>
The plug and socket on it get dirty and need cleaning on a regular
basis. This controls throttle response and shifting. I recommend an
electronic spray contact cleaner, but even WD40 will do in a pinch.
If you have a multimeter I can give you the electrical test info for the
TPS also.
Mike
paul wrote:
> Well - this is all related to an "assumed" tranny problem, after having much
> work ($$$) done the problem wasn't fixed - Went back to tranny shop and they
> claimed a spark or vacuum problem. I changed plugs, wires, cap, rotor, and
> even the ignition coil. no improvement. Went to a recommended service shop -
> they told me that the crack in the exhaust manifold was causing the O2
> sensor to mis-read and this created the tranny shifting problem --- well -
> after replacing the manifold there is no improvement in performance:
> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears - it
> should be like a rocket) remaining at full throttle it will wind up and not
> change gears unless foot is let off throttle. Then at highway speeds when
> trying to pass it used to rev up to 3500 rpm's with no drive train
> response - now (after second visit to tranny shop) it will not go over 60
> mph on the freeway and rpm's remain constant (although if I put it in
> neutral it will rev up).
>
> So the service shop is guesstimating that the computer is bad - but finding
> one is proving difficult - the service shop is continuing diagnosis to see
> if they can verify the computer is faulty......
>
> thanks
> paul
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>> Some folks have been told their ECM is dead after getting the emergency
>> brake recall done. There is a wire there on a bolt that is the ground for
>> the fuel pump and if the 'tech' doesn't know about it, it can be left off
>> and nothing they can do will make the pump work so they think the main ECM
>> is dead.
>>
>> The other grounds for the ECM are near the oil dipstick bolted onto the
>> block.
>>
>> It is a bit unusual to hear of a dead computer in a YJ...
>>
>> Mike
>>
>> paul wrote:
>>> Ground strap is verified, brake wires are solid.....
>>> ? ? ?
>>>
>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>> paul wrote:
>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>
>>>>> thanks
>>>>> paul
>>>> Just FYI, if the ground strap that runs from the rear of the engine head
>>>> up to the firewall goes punky, it will cause a computer failure.
>>>>
>>>> So can the recall on the emergency brake if they forget to hook up one
>>>> wire onto the bolt there.
>>>>
>>>> Mike
>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>> 88 Cherokee 235 BFG AT's
>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>> (More Off Road album links at bottom of the view page)
>
04-27-2007, 06:58 PM
#34
Guest
Posts: n/a
Re: ECM for 93 YJ
I went through all connections and cleaned them and added die-electric
grease.....
BUT -
I got a call from the shop this afternoon and they found the problem - I got
Helen (that's what I call her) back today and everything is fine - I spent
WAY too much money trying to chase this problem down.
It was the distributor !
So - did I need to rebuild the transmission?
I'm guessing no - and I will have a few words with them about it on Monday.
Did I need the new exhaust manifold?
It was cracked but it wasn't effecting performance - but it is a nice to
have as I plan on keeping this jeep for a long time.
Did I need to buy new plugs, wires, rotor, cap and ignition coil?
The distributor cap was VERY corroded with that white powdery dusty stuff
(maybe that was a clue) but other than that everything else was still in
good condition.
All I really know is that in the last 4 weeks 'Helen' has only been home for
about 5 days and I missed her dearly - it feels good to have her back (my
pocket book will recover). I also am thankful that the service shop was
relentless in tracking this solution down, I was really starting to worry.
Thanks to all for the tips and tricks.
paul
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4632388a$0$4933$9a6e19ea@unlimited.newshostin g.com...
> You are describing a failure in the TPS to me.
>
> The plug and socket on it get dirty and need cleaning on a regular basis.
> This controls throttle response and shifting. I recommend an electronic
> spray contact cleaner, but even WD40 will do in a pinch.
>
> If you have a multimeter I can give you the electrical test info for the
> TPS also.
>
> Mike
>
> paul wrote:
>> Well - this is all related to an "assumed" tranny problem, after having
>> much work ($$$) done the problem wasn't fixed - Went back to tranny shop
>> and they claimed a spark or vacuum problem. I changed plugs, wires, cap,
>> rotor, and even the ignition coil. no improvement. Went to a recommended
>> service shop - they told me that the crack in the exhaust manifold was
>> causing the O2 sensor to mis-read and this created the tranny shifting
>> problem --- well - after replacing the manifold there is no improvement
>> in performance:
>> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears -
>> it should be like a rocket) remaining at full throttle it will wind up
>> and not change gears unless foot is let off throttle. Then at highway
>> speeds when trying to pass it used to rev up to 3500 rpm's with no drive
>> train response - now (after second visit to tranny shop) it will not go
>> over 60 mph on the freeway and rpm's remain constant (although if I put
>> it in neutral it will rev up).
>>
>> So the service shop is guesstimating that the computer is bad - but
>> finding one is proving difficult - the service shop is continuing
>> diagnosis to see if they can verify the computer is faulty......
>>
>> thanks
>> paul
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>>> Some folks have been told their ECM is dead after getting the emergency
>>> brake recall done. There is a wire there on a bolt that is the ground
>>> for the fuel pump and if the 'tech' doesn't know about it, it can be
>>> left off and nothing they can do will make the pump work so they think
>>> the main ECM is dead.
>>>
>>> The other grounds for the ECM are near the oil dipstick bolted onto the
>>> block.
>>>
>>> It is a bit unusual to hear of a dead computer in a YJ...
>>>
>>> Mike
>>>
>>> paul wrote:
>>>> Ground strap is verified, brake wires are solid.....
>>>> ? ? ?
>>>>
>>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>>> paul wrote:
>>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>>
>>>>>> thanks
>>>>>> paul
>>>>> Just FYI, if the ground strap that runs from the rear of the engine
>>>>> head up to the firewall goes punky, it will cause a computer failure.
>>>>>
>>>>> So can the recall on the emergency brake if they forget to hook up one
>>>>> wire onto the bolt there.
>>>>>
>>>>> Mike
>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>> 88 Cherokee 235 BFG AT's
>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>> (More Off Road album links at bottom of the view page)
>>
grease.....
BUT -
I got a call from the shop this afternoon and they found the problem - I got
Helen (that's what I call her) back today and everything is fine - I spent
WAY too much money trying to chase this problem down.
It was the distributor !
So - did I need to rebuild the transmission?
I'm guessing no - and I will have a few words with them about it on Monday.
Did I need the new exhaust manifold?
It was cracked but it wasn't effecting performance - but it is a nice to
have as I plan on keeping this jeep for a long time.
Did I need to buy new plugs, wires, rotor, cap and ignition coil?
The distributor cap was VERY corroded with that white powdery dusty stuff
(maybe that was a clue) but other than that everything else was still in
good condition.
All I really know is that in the last 4 weeks 'Helen' has only been home for
about 5 days and I missed her dearly - it feels good to have her back (my
pocket book will recover). I also am thankful that the service shop was
relentless in tracking this solution down, I was really starting to worry.
Thanks to all for the tips and tricks.
paul
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4632388a$0$4933$9a6e19ea@unlimited.newshostin g.com...
> You are describing a failure in the TPS to me.
>
> The plug and socket on it get dirty and need cleaning on a regular basis.
> This controls throttle response and shifting. I recommend an electronic
> spray contact cleaner, but even WD40 will do in a pinch.
>
> If you have a multimeter I can give you the electrical test info for the
> TPS also.
>
> Mike
>
> paul wrote:
>> Well - this is all related to an "assumed" tranny problem, after having
>> much work ($$$) done the problem wasn't fixed - Went back to tranny shop
>> and they claimed a spark or vacuum problem. I changed plugs, wires, cap,
>> rotor, and even the ignition coil. no improvement. Went to a recommended
>> service shop - they told me that the crack in the exhaust manifold was
>> causing the O2 sensor to mis-read and this created the tranny shifting
>> problem --- well - after replacing the manifold there is no improvement
>> in performance:
>> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears -
>> it should be like a rocket) remaining at full throttle it will wind up
>> and not change gears unless foot is let off throttle. Then at highway
>> speeds when trying to pass it used to rev up to 3500 rpm's with no drive
>> train response - now (after second visit to tranny shop) it will not go
>> over 60 mph on the freeway and rpm's remain constant (although if I put
>> it in neutral it will rev up).
>>
>> So the service shop is guesstimating that the computer is bad - but
>> finding one is proving difficult - the service shop is continuing
>> diagnosis to see if they can verify the computer is faulty......
>>
>> thanks
>> paul
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>>> Some folks have been told their ECM is dead after getting the emergency
>>> brake recall done. There is a wire there on a bolt that is the ground
>>> for the fuel pump and if the 'tech' doesn't know about it, it can be
>>> left off and nothing they can do will make the pump work so they think
>>> the main ECM is dead.
>>>
>>> The other grounds for the ECM are near the oil dipstick bolted onto the
>>> block.
>>>
>>> It is a bit unusual to hear of a dead computer in a YJ...
>>>
>>> Mike
>>>
>>> paul wrote:
>>>> Ground strap is verified, brake wires are solid.....
>>>> ? ? ?
>>>>
>>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>>> paul wrote:
>>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>>
>>>>>> thanks
>>>>>> paul
>>>>> Just FYI, if the ground strap that runs from the rear of the engine
>>>>> head up to the firewall goes punky, it will cause a computer failure.
>>>>>
>>>>> So can the recall on the emergency brake if they forget to hook up one
>>>>> wire onto the bolt there.
>>>>>
>>>>> Mike
>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>> 88 Cherokee 235 BFG AT's
>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>> (More Off Road album links at bottom of the view page)
>>
04-27-2007, 06:58 PM
#35
Guest
Posts: n/a
Re: ECM for 93 YJ
I went through all connections and cleaned them and added die-electric
grease.....
BUT -
I got a call from the shop this afternoon and they found the problem - I got
Helen (that's what I call her) back today and everything is fine - I spent
WAY too much money trying to chase this problem down.
It was the distributor !
So - did I need to rebuild the transmission?
I'm guessing no - and I will have a few words with them about it on Monday.
Did I need the new exhaust manifold?
It was cracked but it wasn't effecting performance - but it is a nice to
have as I plan on keeping this jeep for a long time.
Did I need to buy new plugs, wires, rotor, cap and ignition coil?
The distributor cap was VERY corroded with that white powdery dusty stuff
(maybe that was a clue) but other than that everything else was still in
good condition.
All I really know is that in the last 4 weeks 'Helen' has only been home for
about 5 days and I missed her dearly - it feels good to have her back (my
pocket book will recover). I also am thankful that the service shop was
relentless in tracking this solution down, I was really starting to worry.
Thanks to all for the tips and tricks.
paul
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4632388a$0$4933$9a6e19ea@unlimited.newshostin g.com...
> You are describing a failure in the TPS to me.
>
> The plug and socket on it get dirty and need cleaning on a regular basis.
> This controls throttle response and shifting. I recommend an electronic
> spray contact cleaner, but even WD40 will do in a pinch.
>
> If you have a multimeter I can give you the electrical test info for the
> TPS also.
>
> Mike
>
> paul wrote:
>> Well - this is all related to an "assumed" tranny problem, after having
>> much work ($$$) done the problem wasn't fixed - Went back to tranny shop
>> and they claimed a spark or vacuum problem. I changed plugs, wires, cap,
>> rotor, and even the ignition coil. no improvement. Went to a recommended
>> service shop - they told me that the crack in the exhaust manifold was
>> causing the O2 sensor to mis-read and this created the tranny shifting
>> problem --- well - after replacing the manifold there is no improvement
>> in performance:
>> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears -
>> it should be like a rocket) remaining at full throttle it will wind up
>> and not change gears unless foot is let off throttle. Then at highway
>> speeds when trying to pass it used to rev up to 3500 rpm's with no drive
>> train response - now (after second visit to tranny shop) it will not go
>> over 60 mph on the freeway and rpm's remain constant (although if I put
>> it in neutral it will rev up).
>>
>> So the service shop is guesstimating that the computer is bad - but
>> finding one is proving difficult - the service shop is continuing
>> diagnosis to see if they can verify the computer is faulty......
>>
>> thanks
>> paul
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>>> Some folks have been told their ECM is dead after getting the emergency
>>> brake recall done. There is a wire there on a bolt that is the ground
>>> for the fuel pump and if the 'tech' doesn't know about it, it can be
>>> left off and nothing they can do will make the pump work so they think
>>> the main ECM is dead.
>>>
>>> The other grounds for the ECM are near the oil dipstick bolted onto the
>>> block.
>>>
>>> It is a bit unusual to hear of a dead computer in a YJ...
>>>
>>> Mike
>>>
>>> paul wrote:
>>>> Ground strap is verified, brake wires are solid.....
>>>> ? ? ?
>>>>
>>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>>> paul wrote:
>>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>>
>>>>>> thanks
>>>>>> paul
>>>>> Just FYI, if the ground strap that runs from the rear of the engine
>>>>> head up to the firewall goes punky, it will cause a computer failure.
>>>>>
>>>>> So can the recall on the emergency brake if they forget to hook up one
>>>>> wire onto the bolt there.
>>>>>
>>>>> Mike
>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>> 88 Cherokee 235 BFG AT's
>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>> (More Off Road album links at bottom of the view page)
>>
grease.....
BUT -
I got a call from the shop this afternoon and they found the problem - I got
Helen (that's what I call her) back today and everything is fine - I spent
WAY too much money trying to chase this problem down.
It was the distributor !
So - did I need to rebuild the transmission?
I'm guessing no - and I will have a few words with them about it on Monday.
Did I need the new exhaust manifold?
It was cracked but it wasn't effecting performance - but it is a nice to
have as I plan on keeping this jeep for a long time.
Did I need to buy new plugs, wires, rotor, cap and ignition coil?
The distributor cap was VERY corroded with that white powdery dusty stuff
(maybe that was a clue) but other than that everything else was still in
good condition.
All I really know is that in the last 4 weeks 'Helen' has only been home for
about 5 days and I missed her dearly - it feels good to have her back (my
pocket book will recover). I also am thankful that the service shop was
relentless in tracking this solution down, I was really starting to worry.
Thanks to all for the tips and tricks.
paul
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4632388a$0$4933$9a6e19ea@unlimited.newshostin g.com...
> You are describing a failure in the TPS to me.
>
> The plug and socket on it get dirty and need cleaning on a regular basis.
> This controls throttle response and shifting. I recommend an electronic
> spray contact cleaner, but even WD40 will do in a pinch.
>
> If you have a multimeter I can give you the electrical test info for the
> TPS also.
>
> Mike
>
> paul wrote:
>> Well - this is all related to an "assumed" tranny problem, after having
>> much work ($$$) done the problem wasn't fixed - Went back to tranny shop
>> and they claimed a spark or vacuum problem. I changed plugs, wires, cap,
>> rotor, and even the ignition coil. no improvement. Went to a recommended
>> service shop - they told me that the crack in the exhaust manifold was
>> causing the O2 sensor to mis-read and this created the tranny shifting
>> problem --- well - after replacing the manifold there is no improvement
>> in performance:
>> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears -
>> it should be like a rocket) remaining at full throttle it will wind up
>> and not change gears unless foot is let off throttle. Then at highway
>> speeds when trying to pass it used to rev up to 3500 rpm's with no drive
>> train response - now (after second visit to tranny shop) it will not go
>> over 60 mph on the freeway and rpm's remain constant (although if I put
>> it in neutral it will rev up).
>>
>> So the service shop is guesstimating that the computer is bad - but
>> finding one is proving difficult - the service shop is continuing
>> diagnosis to see if they can verify the computer is faulty......
>>
>> thanks
>> paul
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>>> Some folks have been told their ECM is dead after getting the emergency
>>> brake recall done. There is a wire there on a bolt that is the ground
>>> for the fuel pump and if the 'tech' doesn't know about it, it can be
>>> left off and nothing they can do will make the pump work so they think
>>> the main ECM is dead.
>>>
>>> The other grounds for the ECM are near the oil dipstick bolted onto the
>>> block.
>>>
>>> It is a bit unusual to hear of a dead computer in a YJ...
>>>
>>> Mike
>>>
>>> paul wrote:
>>>> Ground strap is verified, brake wires are solid.....
>>>> ? ? ?
>>>>
>>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>>> paul wrote:
>>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>>
>>>>>> thanks
>>>>>> paul
>>>>> Just FYI, if the ground strap that runs from the rear of the engine
>>>>> head up to the firewall goes punky, it will cause a computer failure.
>>>>>
>>>>> So can the recall on the emergency brake if they forget to hook up one
>>>>> wire onto the bolt there.
>>>>>
>>>>> Mike
>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>> 88 Cherokee 235 BFG AT's
>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>> (More Off Road album links at bottom of the view page)
>>
04-27-2007, 06:58 PM
#36
Guest
Posts: n/a
Re: ECM for 93 YJ
I went through all connections and cleaned them and added die-electric
grease.....
BUT -
I got a call from the shop this afternoon and they found the problem - I got
Helen (that's what I call her) back today and everything is fine - I spent
WAY too much money trying to chase this problem down.
It was the distributor !
So - did I need to rebuild the transmission?
I'm guessing no - and I will have a few words with them about it on Monday.
Did I need the new exhaust manifold?
It was cracked but it wasn't effecting performance - but it is a nice to
have as I plan on keeping this jeep for a long time.
Did I need to buy new plugs, wires, rotor, cap and ignition coil?
The distributor cap was VERY corroded with that white powdery dusty stuff
(maybe that was a clue) but other than that everything else was still in
good condition.
All I really know is that in the last 4 weeks 'Helen' has only been home for
about 5 days and I missed her dearly - it feels good to have her back (my
pocket book will recover). I also am thankful that the service shop was
relentless in tracking this solution down, I was really starting to worry.
Thanks to all for the tips and tricks.
paul
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4632388a$0$4933$9a6e19ea@unlimited.newshostin g.com...
> You are describing a failure in the TPS to me.
>
> The plug and socket on it get dirty and need cleaning on a regular basis.
> This controls throttle response and shifting. I recommend an electronic
> spray contact cleaner, but even WD40 will do in a pinch.
>
> If you have a multimeter I can give you the electrical test info for the
> TPS also.
>
> Mike
>
> paul wrote:
>> Well - this is all related to an "assumed" tranny problem, after having
>> much work ($$$) done the problem wasn't fixed - Went back to tranny shop
>> and they claimed a spark or vacuum problem. I changed plugs, wires, cap,
>> rotor, and even the ignition coil. no improvement. Went to a recommended
>> service shop - they told me that the crack in the exhaust manifold was
>> causing the O2 sensor to mis-read and this created the tranny shifting
>> problem --- well - after replacing the manifold there is no improvement
>> in performance:
>> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears -
>> it should be like a rocket) remaining at full throttle it will wind up
>> and not change gears unless foot is let off throttle. Then at highway
>> speeds when trying to pass it used to rev up to 3500 rpm's with no drive
>> train response - now (after second visit to tranny shop) it will not go
>> over 60 mph on the freeway and rpm's remain constant (although if I put
>> it in neutral it will rev up).
>>
>> So the service shop is guesstimating that the computer is bad - but
>> finding one is proving difficult - the service shop is continuing
>> diagnosis to see if they can verify the computer is faulty......
>>
>> thanks
>> paul
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>>> Some folks have been told their ECM is dead after getting the emergency
>>> brake recall done. There is a wire there on a bolt that is the ground
>>> for the fuel pump and if the 'tech' doesn't know about it, it can be
>>> left off and nothing they can do will make the pump work so they think
>>> the main ECM is dead.
>>>
>>> The other grounds for the ECM are near the oil dipstick bolted onto the
>>> block.
>>>
>>> It is a bit unusual to hear of a dead computer in a YJ...
>>>
>>> Mike
>>>
>>> paul wrote:
>>>> Ground strap is verified, brake wires are solid.....
>>>> ? ? ?
>>>>
>>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>>> paul wrote:
>>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>>
>>>>>> thanks
>>>>>> paul
>>>>> Just FYI, if the ground strap that runs from the rear of the engine
>>>>> head up to the firewall goes punky, it will cause a computer failure.
>>>>>
>>>>> So can the recall on the emergency brake if they forget to hook up one
>>>>> wire onto the bolt there.
>>>>>
>>>>> Mike
>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>> 88 Cherokee 235 BFG AT's
>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>> (More Off Road album links at bottom of the view page)
>>
grease.....
BUT -
I got a call from the shop this afternoon and they found the problem - I got
Helen (that's what I call her) back today and everything is fine - I spent
WAY too much money trying to chase this problem down.
It was the distributor !
So - did I need to rebuild the transmission?
I'm guessing no - and I will have a few words with them about it on Monday.
Did I need the new exhaust manifold?
It was cracked but it wasn't effecting performance - but it is a nice to
have as I plan on keeping this jeep for a long time.
Did I need to buy new plugs, wires, rotor, cap and ignition coil?
The distributor cap was VERY corroded with that white powdery dusty stuff
(maybe that was a clue) but other than that everything else was still in
good condition.
All I really know is that in the last 4 weeks 'Helen' has only been home for
about 5 days and I missed her dearly - it feels good to have her back (my
pocket book will recover). I also am thankful that the service shop was
relentless in tracking this solution down, I was really starting to worry.
Thanks to all for the tips and tricks.
paul
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4632388a$0$4933$9a6e19ea@unlimited.newshostin g.com...
> You are describing a failure in the TPS to me.
>
> The plug and socket on it get dirty and need cleaning on a regular basis.
> This controls throttle response and shifting. I recommend an electronic
> spray contact cleaner, but even WD40 will do in a pinch.
>
> If you have a multimeter I can give you the electrical test info for the
> TPS also.
>
> Mike
>
> paul wrote:
>> Well - this is all related to an "assumed" tranny problem, after having
>> much work ($$$) done the problem wasn't fixed - Went back to tranny shop
>> and they claimed a spark or vacuum problem. I changed plugs, wires, cap,
>> rotor, and even the ignition coil. no improvement. Went to a recommended
>> service shop - they told me that the crack in the exhaust manifold was
>> causing the O2 sensor to mis-read and this created the tranny shifting
>> problem --- well - after replacing the manifold there is no improvement
>> in performance:
>> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears -
>> it should be like a rocket) remaining at full throttle it will wind up
>> and not change gears unless foot is let off throttle. Then at highway
>> speeds when trying to pass it used to rev up to 3500 rpm's with no drive
>> train response - now (after second visit to tranny shop) it will not go
>> over 60 mph on the freeway and rpm's remain constant (although if I put
>> it in neutral it will rev up).
>>
>> So the service shop is guesstimating that the computer is bad - but
>> finding one is proving difficult - the service shop is continuing
>> diagnosis to see if they can verify the computer is faulty......
>>
>> thanks
>> paul
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>>> Some folks have been told their ECM is dead after getting the emergency
>>> brake recall done. There is a wire there on a bolt that is the ground
>>> for the fuel pump and if the 'tech' doesn't know about it, it can be
>>> left off and nothing they can do will make the pump work so they think
>>> the main ECM is dead.
>>>
>>> The other grounds for the ECM are near the oil dipstick bolted onto the
>>> block.
>>>
>>> It is a bit unusual to hear of a dead computer in a YJ...
>>>
>>> Mike
>>>
>>> paul wrote:
>>>> Ground strap is verified, brake wires are solid.....
>>>> ? ? ?
>>>>
>>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>>> paul wrote:
>>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>>
>>>>>> thanks
>>>>>> paul
>>>>> Just FYI, if the ground strap that runs from the rear of the engine
>>>>> head up to the firewall goes punky, it will cause a computer failure.
>>>>>
>>>>> So can the recall on the emergency brake if they forget to hook up one
>>>>> wire onto the bolt there.
>>>>>
>>>>> Mike
>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>> 88 Cherokee 235 BFG AT's
>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>> (More Off Road album links at bottom of the view page)
>>
04-27-2007, 06:58 PM
#37
Guest
Posts: n/a
Re: ECM for 93 YJ
I went through all connections and cleaned them and added die-electric
grease.....
BUT -
I got a call from the shop this afternoon and they found the problem - I got
Helen (that's what I call her) back today and everything is fine - I spent
WAY too much money trying to chase this problem down.
It was the distributor !
So - did I need to rebuild the transmission?
I'm guessing no - and I will have a few words with them about it on Monday.
Did I need the new exhaust manifold?
It was cracked but it wasn't effecting performance - but it is a nice to
have as I plan on keeping this jeep for a long time.
Did I need to buy new plugs, wires, rotor, cap and ignition coil?
The distributor cap was VERY corroded with that white powdery dusty stuff
(maybe that was a clue) but other than that everything else was still in
good condition.
All I really know is that in the last 4 weeks 'Helen' has only been home for
about 5 days and I missed her dearly - it feels good to have her back (my
pocket book will recover). I also am thankful that the service shop was
relentless in tracking this solution down, I was really starting to worry.
Thanks to all for the tips and tricks.
paul
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4632388a$0$4933$9a6e19ea@unlimited.newshostin g.com...
> You are describing a failure in the TPS to me.
>
> The plug and socket on it get dirty and need cleaning on a regular basis.
> This controls throttle response and shifting. I recommend an electronic
> spray contact cleaner, but even WD40 will do in a pinch.
>
> If you have a multimeter I can give you the electrical test info for the
> TPS also.
>
> Mike
>
> paul wrote:
>> Well - this is all related to an "assumed" tranny problem, after having
>> much work ($$$) done the problem wasn't fixed - Went back to tranny shop
>> and they claimed a spark or vacuum problem. I changed plugs, wires, cap,
>> rotor, and even the ignition coil. no improvement. Went to a recommended
>> service shop - they told me that the crack in the exhaust manifold was
>> causing the O2 sensor to mis-read and this created the tranny shifting
>> problem --- well - after replacing the manifold there is no improvement
>> in performance:
>> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears -
>> it should be like a rocket) remaining at full throttle it will wind up
>> and not change gears unless foot is let off throttle. Then at highway
>> speeds when trying to pass it used to rev up to 3500 rpm's with no drive
>> train response - now (after second visit to tranny shop) it will not go
>> over 60 mph on the freeway and rpm's remain constant (although if I put
>> it in neutral it will rev up).
>>
>> So the service shop is guesstimating that the computer is bad - but
>> finding one is proving difficult - the service shop is continuing
>> diagnosis to see if they can verify the computer is faulty......
>>
>> thanks
>> paul
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>>> Some folks have been told their ECM is dead after getting the emergency
>>> brake recall done. There is a wire there on a bolt that is the ground
>>> for the fuel pump and if the 'tech' doesn't know about it, it can be
>>> left off and nothing they can do will make the pump work so they think
>>> the main ECM is dead.
>>>
>>> The other grounds for the ECM are near the oil dipstick bolted onto the
>>> block.
>>>
>>> It is a bit unusual to hear of a dead computer in a YJ...
>>>
>>> Mike
>>>
>>> paul wrote:
>>>> Ground strap is verified, brake wires are solid.....
>>>> ? ? ?
>>>>
>>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>>> paul wrote:
>>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>>
>>>>>> thanks
>>>>>> paul
>>>>> Just FYI, if the ground strap that runs from the rear of the engine
>>>>> head up to the firewall goes punky, it will cause a computer failure.
>>>>>
>>>>> So can the recall on the emergency brake if they forget to hook up one
>>>>> wire onto the bolt there.
>>>>>
>>>>> Mike
>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>> 88 Cherokee 235 BFG AT's
>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>> (More Off Road album links at bottom of the view page)
>>
grease.....
BUT -
I got a call from the shop this afternoon and they found the problem - I got
Helen (that's what I call her) back today and everything is fine - I spent
WAY too much money trying to chase this problem down.
It was the distributor !
So - did I need to rebuild the transmission?
I'm guessing no - and I will have a few words with them about it on Monday.
Did I need the new exhaust manifold?
It was cracked but it wasn't effecting performance - but it is a nice to
have as I plan on keeping this jeep for a long time.
Did I need to buy new plugs, wires, rotor, cap and ignition coil?
The distributor cap was VERY corroded with that white powdery dusty stuff
(maybe that was a clue) but other than that everything else was still in
good condition.
All I really know is that in the last 4 weeks 'Helen' has only been home for
about 5 days and I missed her dearly - it feels good to have her back (my
pocket book will recover). I also am thankful that the service shop was
relentless in tracking this solution down, I was really starting to worry.
Thanks to all for the tips and tricks.
paul
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4632388a$0$4933$9a6e19ea@unlimited.newshostin g.com...
> You are describing a failure in the TPS to me.
>
> The plug and socket on it get dirty and need cleaning on a regular basis.
> This controls throttle response and shifting. I recommend an electronic
> spray contact cleaner, but even WD40 will do in a pinch.
>
> If you have a multimeter I can give you the electrical test info for the
> TPS also.
>
> Mike
>
> paul wrote:
>> Well - this is all related to an "assumed" tranny problem, after having
>> much work ($$$) done the problem wasn't fixed - Went back to tranny shop
>> and they claimed a spark or vacuum problem. I changed plugs, wires, cap,
>> rotor, and even the ignition coil. no improvement. Went to a recommended
>> service shop - they told me that the crack in the exhaust manifold was
>> causing the O2 sensor to mis-read and this created the tranny shifting
>> problem --- well - after replacing the manifold there is no improvement
>> in performance:
>> From dead stop - full throttle the vehicle is slow (I6 4.0 3.07 gears -
>> it should be like a rocket) remaining at full throttle it will wind up
>> and not change gears unless foot is let off throttle. Then at highway
>> speeds when trying to pass it used to rev up to 3500 rpm's with no drive
>> train response - now (after second visit to tranny shop) it will not go
>> over 60 mph on the freeway and rpm's remain constant (although if I put
>> it in neutral it will rev up).
>>
>> So the service shop is guesstimating that the computer is bad - but
>> finding one is proving difficult - the service shop is continuing
>> diagnosis to see if they can verify the computer is faulty......
>>
>> thanks
>> paul
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:4631fc30$0$21782$9a6e19ea@unlimited.newshosti ng.com...
>>> Some folks have been told their ECM is dead after getting the emergency
>>> brake recall done. There is a wire there on a bolt that is the ground
>>> for the fuel pump and if the 'tech' doesn't know about it, it can be
>>> left off and nothing they can do will make the pump work so they think
>>> the main ECM is dead.
>>>
>>> The other grounds for the ECM are near the oil dipstick bolted onto the
>>> block.
>>>
>>> It is a bit unusual to hear of a dead computer in a YJ...
>>>
>>> Mike
>>>
>>> paul wrote:
>>>> Ground strap is verified, brake wires are solid.....
>>>> ? ? ?
>>>>
>>>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>>>> news:4630ac5a$0$6663$9a6e19ea@unlimited.newshostin g.com...
>>>>> paul wrote:
>>>>>> Anyone know where to find an ECM module for a 93 YJ, I-6, Automatic?
>>>>>>
>>>>>> thanks
>>>>>> paul
>>>>> Just FYI, if the ground strap that runs from the rear of the engine
>>>>> head up to the firewall goes punky, it will cause a computer failure.
>>>>>
>>>>> So can the recall on the emergency brake if they forget to hook up one
>>>>> wire onto the bolt there.
>>>>>
>>>>> Mike
>>>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>>>> 88 Cherokee 235 BFG AT's
>>>>> Canadian Off Road Trips Photos: Non members can still view!
>>>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>>>> (More Off Road album links at bottom of the view page)
>>