I have a '97 Grand Cherokee 4x4 that has had a myriad of ignition problems (well ... maybe one problem with a myriad of 'solutions'). I finally replaced the computer and the problems stopped for a couple of months. This week the engine died a couple of times while driving in hot weather and then would start again after a few minutes. It then began not starting when driven and then parked for about a half hour. It finally would not start again. No codes, no engine light. Towed to mechanic.
He says the fuel pump and the fuel pump relay are bad. It was replaced last year. The mechanic says the relay may have burnt out the fuel pump over time by creating spikes and low voltage. I don't know much about the system, but that sounds very strange for relays. Is this a likely diagnosis?
Thanks,
Joe M