Having problems with your GMC K2500 ?

Truck was runing good. next day will not start .turns over good but will not fire put fuel in intake manifold still will not fire fuel pump is working this is a 1997 2500 4x4 5.7lt motor auto

Posted / edited by AnonymousUser on : 11-12-2017

Answers :

Hi, first check for sparks by pulling a plug wire off and sticking a phillips screwdriver in the boot. Lay the screwdriver/boot down on the engine with the screwdriver shaft about 1/4 inch from the engine, and crank the engine to see if sparks jump from the screwdriver. If no sparks, suspect you may have a bad crankshaft position sensor, but first verify you have voltage to the coil using a 12 volt test light. If no voltage to the coil, check ECM-1 fuse. See diagram below and let me know if you have questions.
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Please see my tip at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines . These are generic instructions.

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