1984 GMC Truck Won't start, but turns over

Tiny
MYLOW910
  • MEMBER
  • 1984 GMC TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 66,000 MILES
Was driving down the road and the truck died. Truck backfired. Now, after turning the ignition, it will turn over but not start. It is getting fuel though. At a loss. Need your help!
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Monday, February 22nd, 2010 AT 2:30 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do below to determine whether it's fuel or spark related problem:

Cranks but no start condition:

Fuel and Spark:
Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 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.
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Monday, February 22nd, 2010 AT 4:11 PM

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