Hi all, I'm sure some of this has been discussed before, but I couldn't find much through the search function.

I found out yesterday that my PCM istoast and I need a new one if I want my truck to run decent in cold weather. I figure I have 2 options.I can go to the junk yard and get a used PCM. I need to get one with the ID#4886 661, or 4798 342. Cananyone tell me if these PCMs were used in any otherChrysler vehicles, or am I limited tofirst gen. Dakotas?

My second option is to get a performance PCM. I've been doing some research and it looks like I can get eitherJET stage 1 or 2, or I can get the Mopar Performance PCM. Does anyonehave experience withJET or Mopar Performance PCMs? How do you like it? Are there any drawbacks?I've heard that the JET PCMs have a habit of failing or randomly starting on fire, is this true?

My truckis a 1994SLT 3.9 4x4 withhigh-flow exhaust, K&Nair intake, modified V8 TB, and 180* Tstat. Any info you can give me is appreciated. Thanks!

 

Are you saying that your truck only runs bad in cold weather. Who tested the ecu.

 

Yes it only runs bad in cold weather (under 40*F). I have about a dozen other posts describing the problem thorougly but in a nutshell the truck only runs bad 8 minutes after starting to about 13 minutes after starting. Then it runs great. The local Crysler dealer (who I trust very much) tested my computer and told me it was bad.

I'm leaning toward the performance PCMbecause I don't really trust anything from thejunk yard. So whichone do yourecommend? JET or Mopar?

 

i have heard lots of good things about the mopar performance pcm and if i ever decided to get something i would definitaly go that route.

 

I ran a mopar pcm in my 94 dak 5spd and liked it alot, without other mods you will limit gains though

 

I talked to the guys at the dealer and they informed me that mopar doesn't make a performance PCM for a '94 3.9. They quoted me $525 for a stock PCM. I then emailed JET and they said that their chips aren't replacement PCMs they just work with the stock PCM. So now what? Do I really have to go to a junkyard and hope I find something that works? Any other ideas? Thanks

 

you cann save 200.00 through this site on new mopar.
https://www.dodgeparts.com/oe_parts_...34a0cd4ed4cc92

I know its still not cheap but better than 525.......

 

Thanks herkguy,
I'm going to try the junk yard this weekend. I'd rather spend $10 than $300 but if worse comes to worst I'll start looking for a brand new PCM

 

While your at the junk yard grab both the water and air temp senders. The ECU should not only give you a problem at -40.