Don't know hwere to write reply to answers but the jeep has been checked for misfires and has never misfired????I'll ask about compression test can't help but wonder though about the bad wire
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2000 Jeep Grand Cherokee Question: Reply to Roys answer
Answer #1mastertech6371 January 11, 2012, 14:28Master
ok, could be a bad plug or wire but you need to start at basics. with this condition, it may not missfire in a sense that you can feel but needs to be checked anyway. after the compression test, fuel pressure, spark and vacuum leaks are next.
Answer #2greaseball January 30, 2012, 19:02Rookie
If you are receiving misfire codes 301, 304, etc perform the basic plugs and wires. If after you install the plugs and wires you still get a300 check your crank sensor most likely that your problem.Let me know if that fixed your problem.
Replysassycat, January 30, 2012, 22:23Rookie
The Jeep has no code for misfire but that's exactly what it feels like or like it is very slightly out of time but no codes....?