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1988 GMC Sierra wont start

Tiny
TIM30
  • MEMBER
  • 1988 GMC SIERRA
Engine Performance problem
1988 GMC Sierra V8 Two Wheel Drive Automatic

My '88 GMC will start just fine on a cold start. When I drive it for 1 mile and turn it off, it wont start. It turns over but wont fire. I have changed the ignition coil, distributor cap and rotor button. Did not fix problem. It almost feels like it's flooding out. There is a slight gas smell when I try to restart it. Thinking maybe it's the fuel pump. Would like a second opinion before I dish out more money. Your help is needed and very appreciated. Thank you
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Thursday, April 9th, 2009 AT 8:19 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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, distributor pick-up coil, ignition control module, ECM, Ignitor cam and crank sensors- Note: If it doesn't apply disregard it
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Thursday, April 9th, 2009 AT 8:34 PM
Tiny
SAUCERGUY
  • MEMBER
  • 2 POSTS
Ignition control module, super easy to fix. They go out in these makes and models often and are hard to pinpoint.

Pop open the distributor cap, its mounted with 2 screws, just a flat semicircle plate. Unplug the two electrical connectors, replace and put it all back together, you are done.
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Saturday, June 11th, 2016 AT 12:06 AM

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