1999 Other Jeep Models no spark

Tiny
EKRUEG
  • MEMBER
  • 1999 JEEP
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
My 99 jeep grand chrokee has no spark what can be the cause can it be the ecm
Wednesday, February 11th, 2009 AT 1:32 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Do you have the rail coil, 4 wire primary connector? One is B+, with the engine cranking, the other 3 are grounds, one ground for each coil, one coil fires two plugs. If you do alot of cranking, you might disable the injectors, or the fuel system, so the cylinders don't fill with gas.

At some point you may need to check for injector pulse, the injector doesn't need to be plugged in for that. If you have no spark and no injector pulse, it may be a sensor problem.
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Wednesday, February 11th, 2009 AT 2:34 PM

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