carb problems

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Feb 21, 2017 | 03:09 PM

mkhmann

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Joined: Dec 2010

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carb problems

I have a 1984 f150 with a 351w. I rebuilt the carb as i had some leakage in the pump ***. Rebuilt carb(2150 with pollution parts). Installed on manifold. Started engine and carb flooded out. Removed air horn assembly. Started up and gas was bypassing float because gas pressure was to high. Replaced fuel pump and had same problem. I checked fuel pressure and according to shop manual it was in spec. 6-8 psi. My question is their a orifice that would be between fuel filter and seat assem. that I am missing?

Feb 21, 2017 | 03:15 PM

theothewolf

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Joined: Feb 2017

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From: South dfw

Stupid question but how is the float looking?

Feb 21, 2017 | 03:38 PM

LARIAT 85

Cargo Master

Joined: Dec 2004

Posts: 3,362

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From: Florence, SC

Check the needle and seat. If the needle is stuck or if there is debris in there, the needle won't come down and the float will stick.

Sticky float = flooding carburetor.

Feb 21, 2017 | 03:50 PM

Tedster9

Post Fiend

Joined: Apr 2002

Posts: 19,311

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From: Waterloo, Iowa

That almost has to be the problem, assuming the fuel pump pressure isn't excessive. It's good practice to replace needle and seat, if they aren't part of a rebuild kit. Float height/fuel height check carefully.