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1986 GMC C2500 carb

Tiny
JOHNNIEP
  • MEMBER
  • 1986 GMC C2500
Engine Performance problem
1986 GMC C2500 V8 Four Wheel Drive Manual

i have a 350 the truck runs great if im running around town as soon as i open the 4 barrels it falls on its face gas spraying out it has new fuel pump. new pickups in fuel tanks the carb is a quadujet that was newly rebuilt


http://www.2carpros.com/forum/automotive_pictures/563044_SANY1545_1.jpg

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Wednesday, August 18th, 2010 AT 4:35 PM

7 Replies

Tiny
WRENCHTECH
  • MECHANIC
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Where are you seeing gas spraying out?
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Wednesday, August 18th, 2010 AT 4:53 PM
Tiny
JOHNNIEP
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Out of the 4 barrel the back two ports
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Wednesday, August 18th, 2010 AT 7:18 PM
Tiny
WRENCHTECH
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Then you just have a bad carburetor. Replace the carb with one already rebuilt from the factory.
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Wednesday, August 18th, 2010 AT 7:20 PM
Tiny
JOHNNIEP
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This one is newly rebuilt
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Wednesday, August 18th, 2010 AT 7:27 PM
Tiny
WRENCHTECH
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It was either done wrong or the housing is damaged and they didn't know it. The carb is bad.
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Wednesday, August 18th, 2010 AT 7:29 PM
Tiny
JOHNNIEP
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I have also put a holly double pump on it it did the same thing
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Wednesday, August 18th, 2010 AT 7:37 PM
Tiny
WRENCHTECH
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Maybe your not explaining the problem correctly but the only place fuel can come out of the carb is through the carb itself.
Now, are you getting a backfiring or something like that?
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Wednesday, August 18th, 2010 AT 7:39 PM

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