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1991 Chevy S-10 Fuel System loses prime overnight

Tiny
KEITH1961
  • MEMBER
  • 1991 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 185,000 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.
Saturday, March 8th, 2008 AT 5:33 PM

2 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
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
  • MECHANIC
  • 10,371 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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