1995XJ_Sport

While driving, My jeep (1995 4.0 auto) spits and sputters a little bit.. nothing big, but then other times it just dies. Its not all at any certain speed, just random speeds. It tends to do it more when it is warm outside rather then when it was cold. any ideas?

tjwalker

Although there are a few possibilities, the #1 suspect is the "crankshaft position sensor". It is a VERY common failure on the Jeep 4.0 Without the input signal from the crank sensor to the computer, you will lose spark and you will lose fuel going TO the fuel injectors.

They are especially prone to "thermal failure" (ie: heat related, which is what you are mentioning)

Here is a good thread on the crank sensor.

http://www.jeepforum.com/forum/f11/c...ailing-639123/

VTJeep

x2. get it on a code reader first as there might be a code that has stored in there but not tripped the CEL. i found this out recently when after 5 months of having bad o2 sensors (and not throwing a single code the entire time) we had it on a code reader and it showed that in my last trip (the 5 min drive to the shop) it had registering that the downstream o2 was not sweeping thru its range properly. then miraculously, the CEL popped on while we still had the reader plugged in... weird. random. very frustating... my point in all of this is to start basic. pull the TB apart and check the plugs and wires, and your cap and rotor for signs of deterioration as all of these will attribute to a rough running jeep.