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Old 08-14-2010, 03:37 PM
Jrs3800 Jrs3800 is offline
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Re: 94 Lesabre EST not toggling

I am not going to tell you to replace that PCM until you know its bad...

The 94-95 3800 PCM's are some of the worse in terms of failure that I have ever seen... I have seen the older 92-93 PCM's will 250,000 miles on them still going... Pretty much never seen a 94-95 PCM manage that..

On my 95 Bonneville I have been through a total of 5 PCMs in 184,000 Miles... Factory unit failed at 110,000... Code 1361... I too thought ICM... Swapped it out to have the same problem... I got an Advance PCM and problem solved... 1 year later it would do a random stall while driving and then poof back to life.... Once again Code 1361..... I got a junkyard unit and that lasted a while then I ended up with a start but no run condition... The ICM actually starts the car, the PCM is supposed to take over after 400 Rpms... Never happened... You could get it to start, but it wouldn't run good.... The next one did close to the same and only gave me a couple of months.. By this point I was tired of this junk and kept a spare in the trunk... The last one had an issue with the 4k Pulse used by some of the cars electronics, like the Variable Effort steering, Cruise control I think... among a few other... And it sent the dash module into a dinging frenzy as it lost the 4k pulse...

We finally got pissed and updated the 95 Bonneville to a 97 PCM and Wiring Harness( PITA, but cool to be able to tune it at will with the Lap Top )

I also have a 95 Transport, it too did the 1361... I popped another PCM in it and later had idling issues... Never did get that figured out... We rewired it to also accept a 97 PCM for tuning reasons... Funny even with a .517 cam it idled better than it ever did before...LOL

It has to be either the ICM or PCM.... Would you happen to have another 3800 in the household? All of the ICM's and coils on the 3800's are the same from 1993 to the end of production..
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