Carb overflow???
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Junior Member
Joined: Mar 2021
Posts: 75
Likes: 3
From: Texas
Car: 87 sport t top
Engine: 305
Transmission: 700r4
Axle/Gears: 3.23
Carb overflow???
87 camero 305 with the factory rochester ccc quad.
I put a new needle and seat in. New gasket. Set float height. Slapped it on cranked it over and she fired up. Untill fuel poured out from the top of the carb... I've messed with float heights for 3 days. Two needles and seats. What on earth am I doing wrong here??????? Only thing I can think of is I replaced the pusher pump and it's just throwing to much fuel and overriding the needle but it goes through a mechanical pump too so I can't see it being that.
Just for clarification too. The needle and seat is clear of any crud. With the top off I can blow into the fuel inlet and pickup the float and sometimes it does and sometimes it doesn't seal.
I put a new needle and seat in. New gasket. Set float height. Slapped it on cranked it over and she fired up. Untill fuel poured out from the top of the carb... I've messed with float heights for 3 days. Two needles and seats. What on earth am I doing wrong here??????? Only thing I can think of is I replaced the pusher pump and it's just throwing to much fuel and overriding the needle but it goes through a mechanical pump too so I can't see it being that.
Just for clarification too. The needle and seat is clear of any crud. With the top off I can blow into the fuel inlet and pickup the float and sometimes it does and sometimes it doesn't seal.
Joined: Feb 2017
Posts: 4,174
Likes: 569
From: Meriden, CT 06451
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: Carb overflow???
Fuel pressure should be 5.5 psi MAX.
Joined: May 2004
Posts: 5,338
Likes: 72
From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: Carb overflow???
just to check, make sure there is only one gasket under the seat. sometimes the old one gets 'stuck' in there and isn't seen
other than that, post a pic of the needle seat/float assembly installed.
other than that, post a pic of the needle seat/float assembly installed.
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