SOURCE: 1999 4.0L Jeep Grand Cherokee shuts down after 20-30 minutes.
I'd suggest the ignition control module, however I'd have a certified mechanic check it out just in case...
SOURCE: My 2002 Jeep Grand Cherokee. Will die going down
I've got to be reading this incorrectly...You are driving, the engine turns off...you pull off the road? And then without touching the key the engine re-starts, but you haven't touched the key? Or, sometimes you need to sit there for a few minutes and then turn the key to start it?
Testimonial: "Thank you , thats what I was afraid of. Beyond what I can take care of."
SOURCE: 98 jeep grand cherokee dies and starts back
replace the crank angle sensor and this should cure your problem
SOURCE: My 2005 jeep Grand Cherokee is giving me problems starting
check the IACsensor it may be sticking
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