Bogger45

Problem Fixed: PCM

I recently bought my 1992 jeep comanche 4x4 4.0 HO. I've had some issues with it, and even now have her in the shop. I saw the Renix post about things you should do to the truck ones you get it. Any advice on the HO models?

Guys appreciate all the input. I decided to take the Comanche to an actual shop and let them run some diagnostics. A lot of things just do not make sense given the fact this is a weather/temperature related issue. I'll keep everyone posted on what they find.

Well FML drove good for 30 mons then right back at it.

Ok now she's running...there's an issue though after replacing the air intake sensor she no longer sputters at 2rpm she drives perfect...however I'm throwing codes: 12,24,21,14,22,and 23. I just replaced the oxygen sensor, map, TPS, and intake air... Ones again she's surviving the check engine light coming on now but throwing those codes( I feel some hesitation)

Are there any components inside the dash that could cause such issue...just seems weird it gets warm and it will run bad all day?

Cleared restarted. Let it warm up failed again sputtering codes 12,22,23,24,14, 55 end of codes. Guys I don't know if this helps but it ran fine this evening in the cool air until the engined w armed up. During noon however it ran bad all day, with zero recovery until the weather cooled down

New TPS new oxygen sensor new map sensor new coil...still bogging down when I mash the throttle.

Getting codes 12, 22, 23, 24,14, and end of codes 55.gonna replace the TPS.

1992 Jeep Comanche 4.0 High output model Here's the story: My Comanche ran fine all winter. I had to let it sit for 2 months came back and everything seemed fine. Ones the truck got around 100f in the summer weather it starts running like garbage. It will not rev over 2 rpm starts sputtering back firing abd zero power it even effects the charging system and makes the battery gauge drop and the system does not appear to charge the battery. The truck runs fine as long as it cools down and I try to crank it again. I've replaced plugs and wires, checked for vacuum leaks, took the exhaust off to see if it was the catalytic converter, and cleaned the throttle body . None of this worked. I recorded a video of it warm and you can see and hear what's going on https://youtu.be/f4X9cvsPvmo Guys in a real jam here just can't figure this out.