[klaucke]

You may have guessed it, I now own (another) Jeep Cherokee. I just picked up a 1994 model, w/ the standard 4.0L I-6 engine, manual trans, 4wd, no bells and no whistles, and 140k miles. Problem is, it runs like crap. It does start and run, but it sounds like it's misfiring.

Up until now, I've heard nothing but good things about Cherokee's, in fact, I own one that runs flawlessly at 150k miles. I've been thinking it might have a clogged catalytic converter... or of course it might be electrical. I popped the distrubutor cap and rotor off and cleaned up the terminals with some sand paper, and I installed new plugs. I'd rather not spend $75 on a new cap, rotor, and wires unless I'm sure thats the reason it's not running right. Perhaps it could be the computer, I've heard of this going bad on a friends 2001 model.

Have you guys heard of any chronic or common problems with this engine? I know my way around a motor for the most part, basically, I just need to diagnose this so I can fix it. Fixing is the easy part. I just don't to throw money at possible solutions, I'd rather fix the specific one and nothing else.

Sorry I left my digicam in a friends car, so I can't post a pic. I will later though. Thanks in advance for any insight!