It's the crank sensor!
Join Date: Nov 2007
Location: Central Minnesota
May sound like a broken record with this response, but what is the status of all tuneup hardware?
Fresh Champion plugs gapped to .035, new quality plug wires, distributor cap, rotor, and fuel filter.
Gotta be sure that is good before looking elsewhere (testing fuel pressure, testing engine management sensors and egr, etc).
99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!