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Fuel delivery problem

Tiny
CHRIS ALLISON
  • MEMBER
  • 1985 GMC S15
I have 1985 GMC s15 pickup truck I have a fuel delivery problem has plenty of gas in the tank I just replaced the fuel pump I have taken fuel line off carb still will not pump gas out of the lines can you please help me.
Thursday, June 7th, 2012 AT 4:03 PM

14 Replies

Tiny
CHRIS ALLISON
  • MEMBER
  • 7 POSTS
Are you able to help me
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-1
Thursday, June 7th, 2012 AT 4:49 PM
Tiny
CHRIS ALLISON
  • MEMBER
  • 7 POSTS
E mail me at chief8point@hotmail. Com
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Thursday, June 7th, 2012 AT 4:59 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
The first thing I would check is the supply line to the fuel pump from the gas tank. You could have a clogged fuel pick up sock.
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Thursday, June 7th, 2012 AT 5:00 PM
Tiny
CHRIS ALLISON
  • MEMBER
  • 7 POSTS
Hooked a suppy hose from pum to a bottle of gas and still wouldn't get gas
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Thursday, June 7th, 2012 AT 5:11 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Is their voltage to the fuel pump fuse?
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Thursday, June 7th, 2012 AT 5:12 PM
Tiny
CHRIS ALLISON
  • MEMBER
  • 7 POSTS
Its a mechanical fuel pump
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Thursday, June 7th, 2012 AT 5:15 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Its a 1985 with a carb read above to the first post cadieman so its a mechanical fuel pump.
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Thursday, June 7th, 2012 AT 5:19 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Chris allison which engine do you have in the truck?
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Thursday, June 7th, 2012 AT 5:20 PM
Tiny
CHRIS ALLISON
  • MEMBER
  • 7 POSTS
2.8 V6
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Thursday, June 7th, 2012 AT 5:22 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Pop off the distributor cap and have someone crank the engine over and see if the rotor is spining?I suspect the rotor isnt turning and something has happened with the timing chain. That would explain why the fuel pump is inop.
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Thursday, June 7th, 2012 AT 5:30 PM
Tiny
CHRIS ALLISON
  • MEMBER
  • 7 POSTS
Took off the distributor cap and turned it over the rotor is spining
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Thursday, June 7th, 2012 AT 5:41 PM
Tiny
SATURNTECH9
  • MECHANIC
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Alright now your down to a worn cam fuel pump rod issue incorrectly installed pump or defective pump.I would remove the pump and hold the rod up with a screw driver while someone cranks the engine to make sure the fuel pump rod is moving properly.
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Thursday, June 7th, 2012 AT 5:51 PM
Tiny
FESTERALLDAY
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  • 1 POST
The carb has a inline fuel filter where the fuel line enters the carb. This filter has a rubber check valve. This valve is destroyed by ethanol fuel. Remove the check valve, throw it out, put the filter back in the carb.
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Sunday, July 29th, 2012 AT 7:26 AM
Tiny
SATURNTECH9
  • MECHANIC
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Oh I thought you removed the hose from the carb to see that no fuel was pumping from the fuel pump. If I knew that was the case we could have narrowed it down a lot quicker. Glad to hear you got it figured out though.
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Sunday, July 29th, 2012 AT 3:21 PM

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