I've got a 1992 Jeep Cherokee Laredo 4x2 that's started stuttering like it's starving for fuel but only after it's warmed up... about 10-20 minutes straight driving no matter I'm driving the highway or streets.
I've replaced the fuel pump and tried filling up with different companies 87 octane fuel from different service stations, and I've also replaced the Throttle Position Sensor with a new one I got through Chrysler.
It started off that the fuel felt as if it was just cutting off for a split second at a time at only low speeds but has come to cutting off for a split second for 5 to 10 second intervals but only when I press the accelerater. Sometimes I'm able to rev up the RPMs while in gear and it clears it up for a while but it'll come back as long as the Jeep is hot. I'm afraid it'll do perminant damage since it's been stuttering at 55-60 mph on the freeway... the entire truck convulses pretty hard. Please Help!!!

 

1. Be sure tuneup hardware is fresh. For a '92, that includes fresh Champion copper plugs gapped to .035, new plug wires, new distributor cap, rotor, fuel filter

2. Check fuel pressure. MUST be done with a gauge. You should have 31 psi at idle. Then disconnect the vacuum line leading to the fuel pressure regulator and the pressure should jump to approximately 39 psi.

3. Test the coolant temp sensor to be sure that the resistance is in spec.

Good luck!

 

change o2 sensor, it wont throw a code, but should be changed every 100k or so. The only way it will throw a code is if there is a open or short in the circuit, if its reading wrong it wont throw code