2003 GMC 1500 NO SPARK
20

Asked by cheydon Sep 11, 2018 at 05:46 PM about the 2003 GMC Sierra 1500 STD Extended Cab LB

Question type: Maintenance & Repair

VEH WILL CRANK BUT HAS NO SPARK? NO CODES PRESENT. VEH
HAD BAD BATTERY. CHANGED BATTERY AND VEH STARTED BUT DIED
AGAIN WITHIN A COUPLE OF MILES AND WOULD NOT RE-START.
CHECKED INJECTORS WITH NOID LIGHT AND NOID LIGHT FLASHES
WHEN CRANKING ENGINE.
CHECKED PCM FUSES AND THEY ARE GOOD. 12VOLTS TO COILS
AND GROUND IS GOOD. THERE ARE 4 WIRES TO EACH COIL. WHICH
ONE IS THE DRIVER THAT FIRES EACH COIL? ARE THERE ANY
OTHER TESTS THAT I CAN PERFORM?

1 Answer
20

cheydon answered 5 years ago

FOUND OIL LEAK AT REAR OF INTAKE MANIFOLD CAUSING CAM SENSOR WIRE INSULATION TO CRUMBLE AND EXPOSED WIRES SHORTING.

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