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  1. YJ Wrangler Technical Forum
    95 YJ 2.5 auto trans, getting code 41 (alt field) and 46 (battery overcharging). Am getting 20V DC and 60V AC at the battery when its running. Just repaired ECM capacitors and delay start is fixed. Couldn't visually see any damage wires from ECM to alt. Put a brand new alternator in, problem...
  2. TJ Wrangler Technical Forum
    Hello. Jeep Wrangler 2004, 2.4L MT. I have replaced the electronic engine control unit. It needs the right setting because it doesn't work properly. We are unable to install the software update. We use HP tuners for Dodge. It has worked 10 times so far, but the menu for adding software does not...
  3. Engines & Drivetrain
    I have a 2007 Jeep Commander 2WD with a 5.7 HEMI showing P0562 and ABS is showing C121C. I just acquired this vehicle and it has a clear history however I believe it was in a minor flood as the carpet is moldy from the bottom of the doors down. It is throwing 2 codes, P0562 and C121C and the...
  4. XJ Cherokee Technical Forum
    I'v been doing some searching, possibly ♫♩ in all the wrong places ♪♫, and cannot find a diagram for the ECU/ECM for my Jeep. The goal is to see if one can be scratch-built. I know that in another forum, for Subaru, one user had made on using a Rasberry Pi. I'm looking to go a little more...
  5. YJ Wrangler Technical Forum
    I was driving the other day and shortly after I got fuel, my tac, speedometer and all of my gauges went dead. I thought/hoped it might be a loose fuse & continued to drive her for about an hour and then I started to loose a little power, she just couldn't maintain 75, I was driving on the...
  6. TJ Wrangler Technical Forum
    I just bought a used jeep, and have been going through this nightmare recently. I have a 2004 TJ 4.0 liter automatic transmission, it has been driving around in second gear, after about 20-30mph the rpm will go over 2000 and up. A buddy of mine plugged in his reader and found the error code...
  7. XJ Cherokee Technical Forum
    Hi Jeep Forum, I drive a 2000 Cherokee Sport 4WD 6 cylinder 4.0L. I took it to the mechanic the other day to get a check engine light problem addressed and asked them to pull the error code as I couldn't remember what it was. They couldn't get a reading, and said my PCM was bad. The shop...
  8. YJ Wrangler Technical Forum
    I was given a YJ with an intermittent gremlin that kills the engine at the worst possible times (up a hill, around a curve or middle of an intersection). I am on the verge of getting a new intake and a carburetor and simplify this issue (mostly sarcasm, but will have to do something). I am a...
  9. Audio, CB & Ham Radios, GPS, & Electrical
    I have a 97 Cherokee sport 4L with a strange electrical problem. My Volt-Meter reads normal 14V when I start the engine but jumps to 19V after 12 secs; it does not fluctuate, stays at 19V. However everything works fine (except for the check gauges on the dashboard turns on as soon as the volt...
  10. YJ Wrangler Technical Forum
    On 1995 Jeep YJ 2.5L with 3 speed automatic it is originally equipped with ECM part #56028833 for an automatic; these are hard to find, especially in Belize. Chrysler discontinued making them. I sourced a 56028842 for same year from...
  11. TJ Wrangler Technical Forum
    I've just about finished up my TJ swap and I'm on the home stretch. The project started with two parted out Jeeps: a 2000 and 2004. I performed a transmission swap auto to manual and swapped body tubs. Everything is put together, no conflicts, everything is hooked up, no issues thus far. I...
  12. XJ Cherokee Technical Forum
    So first a little back story. I was driving down the interstate today and had my CE come on. So I stop to get gas and just do an overall check of my Jeep. It starts and runs fine so I take to an Advance Auto down the street and get the code pulled. I have never seen or heard of this code...
  13. YJ Wrangler Technical Forum
    So I'm looking into putting a turbo on my 1993 yj. Under the hood in the stock 4.0, I realize that these Jeeps are OBD1. I also know that 505performance.com supposedly sells a turbo system that will fit my Jeep but id rather do this task on my own so it cost less money than buying a kit. So down...
  14. XJ Cherokee Technical Forum
    So I don't post here a lot, but wanted to say that this is a fantastic resource for Jeep owners, especially my wife's XJ. I have had a few problems I've tackled over the years, but one has come back to haunt me. I've never applied the cylinder 3 injector insulation, and we've occasionally had...
  15. ZJ Grand Cherokee Forum
    Greetings Forum Members - I'm a newbie here. Have a 1994 ZJ Grand Cherokee Laredo 5.2 L V8 with 174,500 total odometer miles. The engine was replaced with remanufactured "Jasper" block at 165,500 miles. I have a long term problem- intermittent OBD code 27 (27 - Injector Control Circuit...
  16. TJ Wrangler Technical Forum
    2006 TJ - Started with a check engine light and a code for only 1 Oxygen sensor, which got replaced, code was reset and the check engine light went out. :laugh: 3 weeks later the check engine light is back on and Now ALL 0'2 Sensors show Codes: P0032 P0038 P0052 P0058. :brickwall An initial...
  17. YJ Wrangler Technical Forum
    Hello, i am new to this forum.. I guess ill start from the beginning. The jeep is a 91 4.0 with an automatic trans. It ran great until i went to the mudhole last week and i parked and it would not start less than 15 mins later. Had to be jump started 5 times to make a 8 mile trip where i could...
  18. ZJ Grand Cherokee Forum
    I've done hours of research and can't confirm if my problem is actually the cps. My jeep has been running great and today all of a sudden it dies as I'm driving. Now I have no gauges working, cranks with no start, no fuel pump prime, no spark. All the signs of a bad cps sensor but when I...
  19. Engines & Drivetrain
    I think I have a throttle position sensor problem that is causing poor shifting on a select-trac . Clearing the flash memory to return it to factory settings worked once, but I don't know how to read codes on this preECM2 system. Is there a pigtail to connect the older ECM to the later...
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