Dec 27, 2021 · The inboard (black) PCM connector "wiggle test" is probably the closest I've come to replicating engine stumble. Many, many posters on this Forum are experiencing the early signs of a …

Dec 19, 2011 · Just to save typing, if you have been successful with getting your Jeep to respond well to the problems of back firing, stumbling, stalling at driving as well as idling speeds, by tie wrapping the …

Jul 31, 2009 · PCM (Powertrain Control Module) in a jeep is the computer box up on the firewall, the reason it is called a PCM and not ECM (Engine Control Module), is because in the new jeeps it does …

Dec 22, 2022 · PCM's ECU's SKIM modules and all the tech related stuff that goes wrong Q&A thread now with SKIM delete!

May 13, 2016 · The advantage of using a PCM from a salvage yard is that you can find a PCM that has not been touched by one of these rebuilders. You can avoid reprogramming if you pull the PCM out …

Nov 5, 2017 · The WJ electronics require good/clean grounds to avoid electronic failure or creating havoc. The purpose of this thread is to pinpoint ground locations along with listing which components …

Feb 16, 2023 · I perform assembly line state restoration on used Jeep pcm's that include a fully licensed manufacturers subscription calibration flash in conjunction with an eeprom coding prodedure that …

Mar 16, 2025 · Hello Everyone, I have found a very detailed wiring diagram of our ECM/PCM, hope this helps someone!

Nov 28, 2016 · In looking at the 95 FSM 4.0 PCM connector pin-out cavities/pins 5, 11, 12, are all grounds for the PCM. These are the black/tan colored ground wires you mentioned so there could be …

Sep 4, 2024 · The test mule a 1993 (10/1992) production 4.0 AW4 Laredo ZJ with VTSS and federal emissions with 80K miles First trial a $49 junkyard PCM from a 1995 4.0 auto(but of course not AW4) …