PCM is shot, now what?

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PCM is shot, now what? - 3/1/2008 7:51:42 PM    CSXfan   Posts: 64 Joined: 1/16/2008 Status: offline 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 is toast 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. Can anyone tell me if these PCMs were used in any other Chrysler vehicles, or am I limited to first gen. Dakotas? My second option is to get a performance PCM. I've been doing some research and it looks like I can get either JET stage 1 or 2, or I can get the Mopar Performance PCM. Does anyone have experience with JET 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 truck is a 1994 SLT 3.9 4x4 with high-flow exhaust, K&N air intake, modified V8 TB, and 180* Tstat. Any info you can give me is appreciated. Thanks! Post #: 1

RE: PCM is shot, now what? - 3/1/2008 10:00:01 PM    injmopar   Posts: 278 Joined: 9/22/2004 Status: offline Are you saying that your truck only runs bad in cold weather. Who tested the ecu. _____________________________ 88 2.2 5SP 95 5.2 Mag A518 8 1/4 Electronic ignition Custom EFI (megasquirt 2.2) (in reply to CSXfan) Post #: 2

RE: PCM is shot, now what? - 3/2/2008 6:45:27 PM    CSXfan   Posts: 64 Joined: 1/16/2008 Status: offline 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 PCM because I don't really trust anything from the junk yard. So which one do you recommend? JET or Mopar?  (in reply to injmopar) Post #: 3

RE: PCM is shot, now what? - 3/3/2008 11:32:01 AM    pitkanen44flyers Posts: 601 Joined: 1/10/2007 Status: offline 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. _____________________________ 00 Dakota 4.7, 5 spd, 4x4, 9.25 rear/3.92 LSD, HF Cat, Aerochamber Duals, Hurst Shifter, 105k 96 XJ, 4.0, auto, 4x4, HF Cat, 40 series, K&N, Accel, M/T, 186k miles! (in reply to CSXfan) Post #: 4

RE: PCM is shot, now what? - 3/3/2008 8:13:34 PM    herkguy Posts: 241 Joined: 2/27/2007 Status: offline I ran a mopar pcm in my 94 dak 5spd and liked it alot, without other mods you will limit gains though _____________________________ 06' Laramie QD cab 4x4 4.7HO, TRX4, Tow, curtain Airbags, htd seats added: Truxedo cover, door sill covers, rear mud guards, Airaid JR and modified airbox intake, Fastman TB, Gibson exhaust Prev: 94 Dak 4x4 5.2 5spd, 01 Dak 4x4 QD cab 4.7 (in reply to pitkanen44flyers) Post #: 5

RE: PCM is shot, now what? - 3/6/2008 5:33:42 AM    CSXfan   Posts: 64 Joined: 1/16/2008 Status: offline 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 (in reply to herkguy) Post #: 6

RE: PCM is shot, now what? - 3/7/2008 8:32:07 AM    herkguy Posts: 241 Joined: 2/27/2007 Status: offline you cann save 200.00 through this site on new mopar. https://www.dodgeparts.com/oe_parts_catalog.html?osCsid=7221f14dcf0c14603234a0cd4ed4cc92 I know its still not cheap but better than 525....... _____________________________ 06' Laramie QD cab 4x4 4.7HO, TRX4, Tow, curtain Airbags, htd seats added: Truxedo cover, door sill covers, rear mud guards, Airaid JR and modified airbox intake, Fastman TB, Gibson exhaust Prev: 94 Dak 4x4 5.2 5spd, 01 Dak 4x4 QD cab 4.7 (in reply to CSXfan) Post #: 7

RE: PCM is shot, now what? - 3/7/2008 6:25:51 PM    CSXfan   Posts: 64 Joined: 1/16/2008 Status: offline 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 (in reply to herkguy) Post #: 8

RE: PCM is shot, now what? - 3/8/2008 6:55:10 PM    injmopar   Posts: 278 Joined: 9/22/2004 Status: offline 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. _____________________________ 88 2.2 5SP 95 5.2 Mag A518 8 1/4 Electronic ignition Custom EFI (megasquirt 2.2) (in reply to CSXfan) Post #: 9

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