1996 GMC Yukon crank but no start

1996 GMC YUKON
100,000 MILES • V8 • 4WD • AUTOMATIC
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MECHMAN3870
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  • 3 POSTS
I have a 96 GMC Yukon 5.7L fuel pump went out and I replaced it still crank but no start replaced crank postion sensor tried to start but did not any help
Sep 27, 2009 at 12:25 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
No start condition do below to determine if its a fuel or spark issue

Disconnect a sparkplug wire or 2 and ground it to the engine -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,cap and rotor /distributor pick-up coil, ignition control module, ECM,Ignitor cam and crank sensors- Note: If it doesn't apply disregard it
Sep 27, 2009 at 12:35 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Welcome, with the engine cranking, any spark at the plugs? Do you have an injector pulse, engine cranking, use a noid lite to test. What is your fuel pressure reading?
Sep 27, 2009 at 12:38 PM
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YELHATS ANDY
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  • 7 POSTS
have the answer very simple fix under 25.00 dollars e mail coprsweet@yahoo.com
Oct 13, 2009 at 12:30 PM
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