No spark

70

Asked by Heriberto Jul 02, 2018 at 02:27 PM about the 1997 Chevrolet C/K 1500 Silverado Extended Cab RWD

Question type: Maintenance & Repair

I have a 1997 gmc sierra with no spark from the coil.
Cranks fine but no start Coil is brand new and so is the
control moduel and chabged crack sensor too still no luck
and i have a p0339 code need help asap this is my daily
driver

2 Answers
60

Devin answered 5 years ago

Check out the plug for the crankshaft position sensor if it's getting power you should hear the fuel pump run but I would check the plug it should be a 3 wire plug 12v power, signal, ground on the signal make sure it pulls to ground check the pins on the plug for oil

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30

Frank answered 3 years ago

Cold start open loop pcm is not in command, therefore rule out sensors,the ignition module makes adjustments untill your pcm goes to close loop.

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