This Jeep runs great and out of nowhere the check engine light will turn on misfires 1 through 6 and run rough. However if I disconnect the positive battery terminal and reset the computer, reconnect the positive battery terminal and start the truck up the problem is gone again. After a while the check engine light will come back on computer says misfire is 1 through 6 and running rough again disconnect the battery terminal to reset and then it's gone again. What is it
What makes this problem better or worse?
Worse at high speeds
How long has your 2002 Jeep Grand Cherokee had this problem?
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It’ll be rather difficult to determine what it is without *hands-on* testing !
Not enough room on this page to list all of the possibilities.
Highly recommend a comprehensive / professional scan test.
Good luck!
