• Tiny
  • jcoolidge
  • 2001 Jeep Grand Cherokee

Engine Performance problem
2001 Jeep Grand Cherokee 6 cyl Four Wheel Drive Automatic

going down the road it died thought it was fuel pump, replaced it still won't start wants to but won't mechanic checked it says it is the coil pack changed that still won't start again it wants to timing?

Do you
have the same problem?
Wednesday, November 3rd, 2010 AT 7:50 PM

1 Reply

  • Tiny
  • rasmataz
  • Member

Cranks but no start condition:

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.

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/broken or jumped timing

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Wednesday, November 3rd, 2010 AT 8:41 PM

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