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

  • 16,283 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.

Please consider a donation to help us answer more questions.
Was this
Wednesday, January 16th, 2013 AT 5:08 PM

Please login or register to post a reply.

Related Engine No Start Questions

Help us by donating