Recent content by RetEBoogie

I'm unfamiliar with the test you speak of.

So a little up date on the xj. I have replaced the ECU, crank, cam, ignition coil, the connector to the coil, inspected the engine harness, synced everything, and I still have a miss fire to the point I'm unable to drive the jeep at all. It is completely intermittent sometimes it runs fine but...

So I got off shift today and decided to check the ECU or PCM due to the randomness of the misfire. I've attached some photos of the only thing I found. There was some corrosion under the circuit board in one spot. Any idea if this would alter the functions of my ECU? Well now I can figure out...

So today the jeep started and ran fine. I turned it off about 3-5 mins after and now it is misfiring again. I checked all connections and all was good. I'm not sure where to go with this thing anymore.

Thanks TheXJDrew. I just went outside and checked the fuse for the O2 sensor and they look fine. I did the camshaft sync with the tooth pick method and still does the same thing. I was going to check fuel pressure today but the rail installed prior to my ownership does not have a spot for the...

I'm unsure as I do not have one to check.

So I do have an update. Walked outside started the Jeep and it ran fine drove it around the field and it ran fine the entire time. Come back to the house turn the Jeep off let it cool completely and now when I fire it up I can rev it to about 2,500 to 2,000 RPMs and it backfires through the...

Also the tach is kinda jumpy when it misfire.

Any starts it's completely random. It's running right at this moment but I can start it and there is a misfire. I am aware of the vapor issue and I'm almost sure that's not the problem. I have the hood of at the moment.

I appreciate the info. I have done the fuel injectors clips and inspected the harness, all looks good. I just don't understand how it runs great for a cycle and the misfires bad, popping from the exhaust and ever now and then from the throttle body.

I recently bought a 2001 jeep Cherokee with 140000 miles on it. It's decently clean and I can't wait to drive it. Only problem is I have a misfire that appears to be random in nature. I can walk out and hit the key misfire, shut it off and try again misfire. Other times I can start it and it...