ECM's ??
Pro
Joined: Oct 2009
Posts: 679
Likes: 0
From: vero beach florida
Just about any parts house, I got mine from Autopartsgiant.com and it came quick, but took me 3 mths to get the core refund, I do not want to speak ill of the Co, but I got the run around, till I threatened to sue.
Thread Starter
Heel & Toe
Joined: Aug 2008
Posts: 22
Likes: 0
??
Well the car has thrown three DTC Codes -34-36-and now 42. I removed the ICM and had it tested and it was bad so I replaced it. the 34 & 36 are now gone but since the new ICM install it threw the 42 code , so at this point im not sure whats going on ??
Last edited by lt14life; Mar 22, 2010 at 06:10 PM.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 411
From: WV
Have you checked you Ignition module..? Here is an explanation of Code 42..( Check wiring at ignition module. Replace ignition module. Possible ECM failure.)..WW
Last edited by WW7; Mar 22, 2010 at 06:44 PM.
Thread Starter
Heel & Toe
Joined: Aug 2008
Posts: 22
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Instructor
Joined: Feb 2009
Posts: 204
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From: Pinellas Park Florida
I am having the same problem. The car was stalling. I got codes 16, 36 & 42. Replaced the coil and ICM. Car runs fine. Idles a little high. Service engine light comes on right away. Code 42 shows up.
Le Mans Master
Joined: Jan 2006
Posts: 5,620
Likes: 206
From: Orlando FL
I really don’t know the pre-existing condition of how the car was running so the above is based on some thin assumptions. In your car, (94) it uses a PCM not a ECM. And even thought have many of the same basic functions they are a very different animal. The PCM is a much more reliable unit than the ECMs were and have much less problems.
If you can put back in the original ICM you might be able to get rid of the 42 code but you will just have to try it. As said if the car is running normal and shifting properly, then the PCM might not be a problem. Before I went down that road to get a PCM I might explore the rest of the car more thoroughly.
Thread Starter
Heel & Toe
Joined: Aug 2008
Posts: 22
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When you tested the ICM was the car running at the time? Because if it was, then the ICM was probably good. Those codes are for the MAP sensor and have nothing to do with the ICM. I don’t know if you got a valid check on the ICM. I would put the original ICM back in the car if it was running at the time and troubleshoot the original codes 34,35.
I really don’t know the pre-existing condition of how the car was running so the above is based on some thin assumptions. In your car, (94) it uses a PCM not a ECM. And even thought have many of the same basic functions they are a very different animal. The PCM is a much more reliable unit than the ECMs were and have much less problems.
If you can put back in the original ICM you might be able to get rid of the 42 code but you will just have to try it. As said if the car is running normal and shifting properly, then the PCM might not be a problem. Before I went down that road to get a PCM I might explore the rest of the car more thoroughly.
I really don’t know the pre-existing condition of how the car was running so the above is based on some thin assumptions. In your car, (94) it uses a PCM not a ECM. And even thought have many of the same basic functions they are a very different animal. The PCM is a much more reliable unit than the ECMs were and have much less problems.
If you can put back in the original ICM you might be able to get rid of the 42 code but you will just have to try it. As said if the car is running normal and shifting properly, then the PCM might not be a problem. Before I went down that road to get a PCM I might explore the rest of the car more thoroughly.
Thread Starter
Heel & Toe
Joined: Aug 2008
Posts: 22
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The original ICM was tested at the parts store on the machine and tested bad. this is what the car is still doing , it starts fine and then after a few minutes it will stall but come back to life very quickly and the only code showing is 42. I can drive it and it shfts perfectly but it will do the stall thing and come back to life , even at 60 MPH . the coil is new, ICM conections and Coil conections are new . I have also checked all of the wiring and cant find any problems.
Thread Starter
Heel & Toe
Joined: Aug 2008
Posts: 22
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Do you know what codes the Optispark will throw ? The reason I ask is because im on my fourth now . The one I have now is a Vented M.S.D. with 10,000 Miles on it . I had and OEM Opti that was bad right out of the box .This car has left me tow truck stranded so many times im afraid to take long drives in it .
Thread Starter
Heel & Toe
Joined: Aug 2008
Posts: 22
Likes: 0
When you tested the ICM was the car running at the time? Because if it was, then the ICM was probably good. Those codes are for the MAP sensor and have nothing to do with the ICM. I don’t know if you got a valid check on the ICM. I would put the original ICM back in the car if it was running at the time and troubleshoot the original codes 34,35.
I really don’t know the pre-existing condition of how the car was running so the above is based on some thin assumptions. In your car, (94) it uses a PCM not a ECM. And even thought have many of the same basic functions they are a very different animal. The PCM is a much more reliable unit than the ECMs were and have much less problems.
If you can put back in the original ICM you might be able to get rid of the 42 code but you will just have to try it. As said if the car is running normal and shifting properly, then the PCM might not be a problem. Before I went down that road to get a PCM I might explore the rest of the car more thoroughly.
I really don’t know the pre-existing condition of how the car was running so the above is based on some thin assumptions. In your car, (94) it uses a PCM not a ECM. And even thought have many of the same basic functions they are a very different animal. The PCM is a much more reliable unit than the ECMs were and have much less problems.
If you can put back in the original ICM you might be able to get rid of the 42 code but you will just have to try it. As said if the car is running normal and shifting properly, then the PCM might not be a problem. Before I went down that road to get a PCM I might explore the rest of the car more thoroughly.
Le Mans Master
Joined: Jan 2006
Posts: 5,620
Likes: 206
From: Orlando FL
Given you have a intermittent condition it's going to be hard to definitely condemn the PCM as to being defective. If you want to go the PCM route, given the conditions, I would not surrender my PCM to a re-build. I would try to buy a used PCM (or borrow one) and hold on the my original. If the PCM actually fixes the problem with 100% confidence, then you might try to get it repaired….or not.
However if a replacement does not fix the problem, then you have a spare PCM that you can hold on to or sell. Might be other options also.
But that’s just me and my approach to the problem.
However if a replacement does not fix the problem, then you have a spare PCM that you can hold on to or sell. Might be other options also.
But that’s just me and my approach to the problem.
Pro
Joined: Oct 2009
Posts: 679
Likes: 0
From: vero beach florida
Given you have had so many problems and they seem to be intermittent, have you checked the wiring?
Have seen many people seem to get parts bad out of the box and then findout out the wiring is bad or loose, especially at the connectors.
Have seen many people seem to get parts bad out of the box and then findout out the wiring is bad or loose, especially at the connectors.