1989 Jeep Cherokee

Tiny
JAIMES5
  • MEMBER
  • 1989 JEEP CHEROKEE
Engine Performance problem
1989 Jeep Cherokee V8 Four Wheel Drive Automatic

My car will start and run for about a month. After that month it will have problems starting. I was wondering if you have any solutions and I have taken this car to a mechanic and he said everything looks good.
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Wednesday, April 16th, 2008 AT 10:16 AM

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Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Next time it refuses to start do below this will tell where its coming from.

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light.

Fuel pump and Injector/s checks out-start checking the ignition system-power to coil, coil/s itself, distributor pick-up, control module, Cam and Crankshaft sensors.

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time
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Wednesday, April 16th, 2008 AT 10:57 AM

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