The Jeep in-line 6 cylinder has never been known for smooth idling. If it idles at 600-800 rpm's, and doesn't stall, it is fine. AutoLite copper plug should be OK. I prefer NGK or Champion copper or the AutoLite APP-985 for the 2000+ 4.0L.
Haha yeah true that. In that case it is idling just fine.
The individual codes were:
Just wondered if one of the codes pulled was a random cylinder misfire,or just the three you mention. If you smell fuel in the engine bay like Tim said you must have a leak. Maybe the fuel injectors o rings for just those three cylinders.
I think you're thinking along the right track. For each of the three codes, the readout was as follows:
--Cylinder misfire detected - cylinder number 1,3,5 (for each individual code, stating for clarity)
--the powertrain control module monitors the crankshaft speed and has detected a misfire condition
--Ignition system fault - spark plugs, ignition wires, coil ****new everything so this is not answer unfortunately
--high or low fuel pressure
I'm still thinking the fuel smell and the misfires are related so I will check injectors. In fact, I know the fuel lines themselves aren't leaking and I was at a dead end there. Hopefully I can update with good news but if anyone has any ideas or experiences to share that would be great. Thank you both