My truck simply stopped running one day

  • 1990 GMC C1500
  • 300,000 MILES

My truck simply stopped running one day. I checked spark, all is good, I checked fuel by removing the fuel line to the throttle body and fuel
flows from there once the ignition is turned on. If I prime the throttle body the truck will start just long enough for the fuel to burn off. I have
had a couple of times where I primed it and the truck ran no problem however when I turned it off and tried to start it the next day I had the same problem. I have replaced the fuel filter, I put a used Throttle Body on. I'm at a loss as to why it will not provide fuel from the injectors?

Wednesday, January 16th, 2013 AT 4:53 PM

1 Reply

  • 16,334 POSTS

With key on, do you have voltage at the injector? Do you have an injector pulse? If no injector ground, check for rpm signal, comes from distributor.

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Wednesday, January 16th, 2013 AT 5:08 PM

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