• Tiny
  • svt28103
  • 1996 GMC

Engine Mechanical problem
1996 Other GMC Models 6 cyl Two Wheel Drive Automatic 113000 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.

Monday, October 4th, 2010 AT 8:17 AM

1 Answer

  • Tiny
  • Wrenchtech
  • Expert
  • 19,812 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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