1996 GMC Sierra

1996 GMC SIERRA
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DONNICADOWNING
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Engine Performance problem
1996 GMC Sierra V8

Teh truck will crank and sometimes start, I have replaced the fuel pump and did a complete tune up. What else should I fix? I don't know where to turn next.
Jun 18, 2010 at 5:55 PM
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RASMATAZ
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If its cranking over and refusing to starts do below to determine if its fuel or spark that's causing it-

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 19, 2010 at 3:21 AM
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