1999 Jeep Grand Cherokee

Engine Performance problem
1999 Jeep Grand Cherokee 6 cyl All Wheel Drive Automatic 130, 00 miles

stalls while driving. Sometimes will start back up again but other times will have to sit 6-12 hours to start again. No check engine or service engine comes on. Water pump fine, thermostat replaced, fuel filter and fuel pump seem to be working fine. Factory defect on PMC board with factory screws have been replaced with sheet metal screws and backed out and inch. Cam shaft relay seems fine, O2 sensor seems fine. Nothing is showing on diagonostics. What other problem am I missing!
Deana mathers
September 29, 2010.

Check out the related content below while we wait for the question to be answered by a professional mechanic.