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2000 Jeep Grand Cherokee - Dies ONLY when hot outside

by boomer415 / September 13, 2008 1:19 AM PDT

We have a 2000 Jeep Grand Cherokee, 4.7L that keeps dying when it is hot outside. No warning, it is not overheating, there are no codes, and it doesn't matter what speed you're going. You can crank and crank and it will not start. You have to sit for 3-5 minutes on the side of the road, without cranking it and then it will start again. We recently just spent quite a bit replacing immobilizer, key sentry -still happening. We tried the whole screws of the computer thing that is posted in this forum - still didn't work. The thing is - it is ONLY during the hot part of the day. Never happens at any other time. Let me know what you think it could be. It's driving us crazy, and like so many of the rest of you, we're about to drive it off the cliff. PLEASE HELP!!

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by artjockey / September 17, 2008 4:28 AM PDT

Maybe you should try seeing if the fuel pump is overheating. Does it still break down if your tank is more than half full?

It could also be a broken temperature sensor somewhere, but this is very unlikely. Its probably something that has to do with the fuel injection system.

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00 JGC Stalling Only When Hot Outside
by boomer415 / September 17, 2008 5:40 AM PDT
In reply to: Hmm..

It breaks down no matter how full the tank is. I was thinking it was the fuel pump too but am no mechanic. How would I go about finding out if it is the fuel pump that is overheating?

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dies when hot
by cabaz25 / May 26, 2010 7:48 AM PDT

my 99 jeep does the same,cant be be the fuel pump,might be a sensor.the tran over heat light comes clue any ideas?????

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Same here...
by Dannyhrndz24 / April 1, 2011 1:05 PM PDT

I have the exact car w/ the exact problem .... If u guys already fixed it plzlet me know what the problem is .. I know it wasn't the fuel pump cause i bought 2 new ones and it still turns of on me .. Plz someone help meee!!!!

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Jeep dies or stalls when hot.
by Ink-inc / July 14, 2012 8:56 AM PDT
In reply to: Same here...

There are numerous issues with this vehicle, I still own one. If its only happening when warm and there are no codes for the check engine light OR a number of erroneous codes this would tell you there are multiple problems. The first thing to check is the battery connection from the main wire harness. Most 1999-2004 jeeps wire harness is elevated an heavy, the vibrations will cause a hair line crack and will cause various error codes depending on what was drawing power at the time. Once this is checked, check your MAP sensor, then you EGR. A couple of other possibilities are crank or cam sensor.

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