LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

93 to 94 PCM HARNESS Conversion HELP!

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Old Apr 1, 2005 | 04:18 PM
  #16  
ZPaul2Fresh8's Avatar
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From: Toledo, Ohio USA
Re: 93 to 94 PCM HARNESS Conversion HELP!

Ok, I disabled VATS, no deal....

I was able to log a sec or two... I'm getting DTC #42 EST Grounded

I'm gonna search for definitions... any thoughts?

Thanks.
Old Apr 1, 2005 | 09:20 PM
  #17  
Max 93's Avatar
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From: New Berlin, WI USA
Re: 93 to 94 PCM HARNESS Conversion HELP!

change the ign. module. I was getting that code also when I did the swap, but my car still ran fine. I changed that and havn't got a engine light since.
Old Apr 2, 2005 | 07:36 AM
  #18  
ZPaul2Fresh8's Avatar
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Re: 93 to 94 PCM HARNESS Conversion HELP!

Originally Posted by Max 93
change the ign. module. I was getting that code also when I did the swap, but my car still ran fine. I changed that and havn't got a engine light since.
Thanks I will try that today. I won't make it to the track, it's raining

Max93, you said your car ran fine, well mine will start an then die after 2 seconds... I hope it IS the ICM....

I've been doing all the testing I can think of, from checking continuity on all the wires to checking the ground wire. Everything checks out ok. The PCM is known to be good.

It runs good for the 2 secs until the PCM throws a DTC42, then it cuts out the fuel.
Old Apr 2, 2005 | 08:31 AM
  #19  
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From: New Berlin, WI USA
Re: 93 to 94 PCM HARNESS Conversion HELP!

mine would run for a few minutes the the engine light would come on, but would still run fine. I tested every thing also and found nothing wrong. I bought a module for a 94 and all was good.
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