I have a 1993 4.0 L Jeep Cherokee. It's ran great all it's life until recently. Now after about 15 minutes of driving it starts to stall. It doesn't completely stall out, but just hitches and sputters. If I pull over turn it off and restart it seems to fix the problem for a couple minutes.

I've replaced a lot of parts and have just about given up. I hope someone has a idea of what this problem could be. I've replaced the plugs, ignition wires, rotor, crank shaft sensor, fuel pump, fuel filter and the idle control motor. And I also cleaned the throttle body. After each repair I take off in it for a test drive and 15 minutes later it has the same problem.

Any ideas? Thanks

 

Iowa have you gotten any CEL codes? If not the next step might be the O2 sensors. But the TPS may need recalibration or replacement as well check those two things and then get back to us.
BTW it is customary to place a little bit on the introductions section so everyone has a chance to meet you.

 

Had some similiar problems on my renix era jeep. Till one day she wouldnt crank at all. Replaced the starter and never had my hiccup problems ever again. I still dont understand why the starter fixed a totally different problem.

There is always the Throttle position sensor. Which seems to be the more likly suspect. Good luck there are alot more guys on this site that know more about the HO motors than I do though.

And also Welcome to CF

 

Check your Cat-Converter to see if it's clogged.Pull your o2 sensors and start it up and go for a ride and see if that makes a difference.