1991 CHEVY S-10 FUEL SYSTEM LOSES PRIME OVERNIGHT

  • Tiny
  • keith1961
  • 1991 Chevrolet S-10

Engine Performance problem
1991 Chevy S-10 4 cyl Two Wheel Drive Automatic 185000 miles

I have to prime fuel system to start truck in the morning. After I do this, the truck runs fine all day. Starts fine, runs smoothly. The rear fuel pump and filter has been replaced.

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Saturday, March 8th, 2008 AT 5:33 PM

2 Replies

  • Tiny
  • mastertechtim
  • Member

Sounds like you need to replace the fuel pump relay. This is what primes the tbi on cold starts. Hope this helps

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Saturday, March 8th, 2008 AT 6:30 PM
  • Tiny
  • blackop555
  • Expert
  • 10,563 posts

Agreeing with tim on this one, but like to add that a TBI vehicle is desinged to bleed the pressure when the engine is off.

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Sunday, March 9th, 2008 AT 10:12 AM

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