2002 Jeep Cherokee ignition problem when hot

Tiny
BOBBYGYM_99
  • MEMBER
  • 2002 JEEP CHEROKEE
  • 4 CYL
  • 4WD
  • MANUAL
  • 140,000 MILES
My newly bought 2002 Cherokee is running at an appropriate running temperature (~one notch below halfway)however after hard driving (uphill, 4x4 sand etc) the car will not restart once turned off. It will only start once the temperature has dropped to below a point at about one notch below the normal op temperature. I assumed that this is a computer ignition safety feature, however as it is now requiring a wait every time we drive it.
Any ideas?
HELP
worried about overheating.
Sunday, January 23rd, 2011 AT 9:10 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Next time it happens w/n start-do below don't wait for nothing to catch it, if its fuel or spark issue-

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.
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Sunday, January 23rd, 2011 AT 9:25 PM

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