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1996 Other GMC Models not starting

Tiny
SVT28103
  • MEMBER
  • 1996 GMC
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 113,000 MILES
I have a 96 gmc catering truck. It has a 4.3 vortec v6. Its not fuel injected, its throttle body injection from the way it looks. The fuel pump kicks on, but it doesnt start.I poured a little gas down the throttle body and it starts no problem, seems like theres no fuel coming to the engine, I dont know if theres a fuel relay of some kind, I really have no idea why fuel isnt getting to the engine. If you have any ideas or advice on whats wrong, id really apreciate it.
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Monday, October 4th, 2010 AT 8:17 AM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Your first step is to use a fuel pressure gauge and find out exactly what the pressure is. If the pressure is normal (9-13PSI), then you have to use a noid light to test for injector pulse and power supply.
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Monday, October 4th, 2010 AT 8:34 AM

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