1990 GMC Sierra

1990 GMC SIERRA
20 MILES • V8 • 2WD • AUTOMATIC
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LADYWILLIAMS
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  • 1 POST
I had my motor rebuilt in this truck, and I only had it back for about 1 week, I drove it today and it cut off on me at a red light, but would not startup until I let it set for a few minutes. What would cause this to happen?
Jun 24, 2010 at 9:14 PM
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RASMATAZ
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  • 75,992 POSTS
Could be a fuel or spark problem-Do below

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 25, 2010 at 4:22 AM