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I thought that maybe some important information of something that I have found out is that when the engine is cold the alternator seems to be working but as soon as I get up to operating temperature it throws the code 41 and the alternator stops working. I was going to try and run some test with...

Ok guys so I’ve posted a couple different threads here pertaining to my 1991 4.0 jeep xj. My first issue was not getting spark. Found that the problem was a faulty pcm. During the process though I replaced a boat load of part. Starter, alternator, battery, spark plugs and wires, coil...

Here’s the old girl Incase y’all were wondering Sent from my iPhone using Tapatalk

I got it running! I had the distributor set about two teeth off! Sent from my iPhone using Tapatalk

I think what fried it was a couple things. The other day my battery died while camping and I used the rangers battery charger and started the jeep while the charger was still hooked up to it. Also I found bare wire on a few different places (yes I properly repaired them before installing new...

Haha it’s ok to ask. Yes I installed the distributor correctly. Cylinder 1 was top read center and rotor is pointing at cylinder 1 spark plug wire Sent from my iPhone using Tapatalk

I am using a pcm specifically for my my 91. Got it from rock auto. The distributor is new, spark plugs new, wires new. I’m getting a good strong spark from the coil and the distributor to the plugs. Sent from my iPhone using Tapatalk

When we were cranking we had 39-42 psi. I’m thinking I might just be flooded. Poured fuel in the TB thinking that maybe I wasn’t getting fuel but looked into the TB and see a puddle sitting in there. So I have a feeling there is too much fuel in there. Sent from my iPhone using Tapatalk

Ok previously on my 1991 jeep xj 4.0 with auto trans I had a no spark issue. I changed the pcm because I found that to be my problem. Now I’m getting good spark and I’m getting fuel but the damn thing still won’t start. I’m driving myself nuts Sent from my iPhone using Tapatalk

Thank you for the info. So basically if the pcm from a 95 is good the 91 jeep should run maybe just with minor issues? Sent from my iPhone using Tapatalk

1991 Jeep xj. 4.0 with aw4 Sent from my iPhone using Tapatalk

So I found out after testing/replacing and fixing many parts, bare wires, and countless other thing on my jeep that my no spark issue was due to a faulty pcm. Now my problem is the spark that I am getting is a weak spark(Orange,red color). Could this be because of a worn out ground strap at back...

No that all sounds right. I took the pcm out of my dads jeep and put it in mine and my problems were solved minus a weak spark. I have the proper year pcm coming tomorrow for my Jeep I just needed to do a check with his from his 95 to make sure it was the computer causing no spark. Thanks for...

Yes that’s correct Sent from my iPhone using Tapatalk

Tcu? Sorry not familiar with the abbreviation Sent from my iPhone using Tapatalk

The pins are the same. I know one difference that the 95 had was that it had an airbag in the steering wheel. Otherwise pretty much the same I believe Sent from my iPhone using Tapatalk

I am currently having an issue with my pcm in 1991 jeep Cherokee 4x4 auto trans. I was wondering if a pcm from a 1995 that is virtually identical will work in my Cherokee. my dad has a 95 and mine is a 91.

I'm almost positive it's 30mm Sent from my iPhone using Tapatalk

I've solved the issue. It was the master switch on the driver door. Picked one up at a local pick a part. Works great now! Sent from my iPhone using Tapatalk

Johnson Valley? Never been wheeling out there but been to KOH. I'd like to wait till I get my LA kit before I do anything out there I think. But when I do I'm totally down! Sent from my iPhone using Tapatalk