2001 GMC Sierra wont turn over

2001 GMC SIERRA
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MARCM1971
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2001 GMC Sierra V8 Four Wheel Drive Automatic

I cant get my motor to turn over, when I finely do, you can rev the engine up to about 3,000 rpms and hold it there, and then it will just fall and try to die. if u pump the gas it will rev back up but fall again and starts to back fire, and sputter. any help would be much appreciated, thank you in advance
Jun 29, 2010 at 1:51 PM
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RASMATAZ
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  • ASE Certified Mechanic
I cant get my motor to turn over,

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 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, 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
Jun 29, 2010 at 9:16 PM
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