jeep pcm

[Sinister68]

Does anyone have a spare jeep cherokee pcm they would be willing to part with?

[carpenle]

I am assuming it is for your 92? Is it the 4.0?

[Sinister68]

Yea Its for the 92. The engine is out of a 89 mj

[carpenle]

I do not think my extra one for my 90 will work for you. I looked at the part #'s and they are different. Does anybody know what years will work? Have you hit the JY's?

[Popsgarage]

Just get the one for the body year since I changed intake and exhaust manifolds from your engine to the engine I installed. Only swap was the block.

[Hypoid]

Just get the one for the body year since I changed intake and exhaust manifolds from your engine to the engine I installed. Only swap was the block.
Yup! The controls go by the model-year, not the block.

[Sinister68]

Sweet thanks guys, I'm still trying to learn abut jeeps:).

[Popsgarage]

No problem Sean! How does it run other then that???????????

[Sinister68]

Other than that it was great then it cut out on me one day go in to work and wouldn't restart the I tried it on my way home and fired right up.

[Popsgarage]

Good to hear. Hope you can figure out what's going on with the PCM.

[Sinister68]

From what I've come up with its fairly common with zj's and what they say is happening matches mine perfectly so hopefully that will cure it

[Sinister68]

So a little up date on the jeep I took the ecu/pcm off the jeep and cleaned the connecters and put it all back together and it fired right up no problems so I let it run for about 30mins or so and took it for lil spin and it was fine, unlike before it would struggle to start and run OK for about five mins then would die out whether I was driving or not and wouldn't start back up for 30 mins or longer sometimes, so do you guys think its good or should I get a new ecu or is that even the problem now, could use some advice guys.

[Popsgarage]

Best bet is to purchase a replacement and either swap it or leave it in the garage. When you pluged it back in, did you use any dielectric grease on the plugs. If not you probably should. It might not be necessary because it's located under the dash, but it certainly couldn't hurt. And since it is located under the dash between the pedal and trans tunnel, maybe you bumped it with your foot and knocked it for a loop.

[Sinister68]

The one I tinkered with and was under the hood on the drivers side by the air filter, that's where the site on Google said it was, it was a black box with one big connecter going to it. When I looked it up on eBay that was the same thing that came up

[Popsgarage]

If it's under the hood, definately use a good glob of dielectric grease when you plug it back in. A pcm short will leave you stranded for sure.

[Hypoid]

Drive it 'till it drops! If there is something wrong with the ECM(?), it will show up on a longer drive.

[Popsgarage]

Drive it 'till it drops!

If the ECM fails, will it still go into limp home mode Mike?????????

[Hypoid]

If the ECM fails, will it still go into limp home mode Mike?????????
More likely he's walking.

[Sinister68]

Its time to hit the junk yard and pick up a spare and few other things for the jeep.