Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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I have a 53 3100 pickup. Rebuilt Rochester type B carb. New fuel tank, fuel lines, fuel pump and fuel filter. When cranking, the carb is overflowing fuel. Tried disconnecting fuel line from inlet side of fuel pump. Started engine, no overflowing. Ran it like this til it died to push " blockage?" thru. Then reconnected the fuel line to fuel pump. Cranked it, it did it again. Took carb apart. No debris in needle valve. Blew thru with my mouth. Flows good. Put it back together. still does it. Tried this twice :( HELP!!
Thanks, Chris

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Sounds like your new fuel pump is putting out too much pressure which would keep the needle from seating properly. Run a pressure test on your fuel pump to see how much pressure the pump is putting out.

laugh wink beer2


The Mangy Old Mutt

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Originally Posted by Junkyard Dog
Sounds like your new fuel pump is putting out too much pressure which would keep the needle from seating properly. Run a pressure test on your fuel pump to see how much pressure the pump is putting out.

laugh wink beer2
Not to worry the new fuel pump made by our friends in China is good for about 60/70 miles before failing. willy

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I would still bet the problem is with the needle and seat, float or dirt or a string of brass from a fitting or teflon.


Gene Schneider
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Thanks guys. Could someone tell me where could I get a new fuel pump NOT made overseas?
Or is there some type of inline fuel pressure regulator? (I'm a plumber and that's what I would do for a water line)
Thanks again.

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To rule out the fuel pump pressure thought you can rig up an IV feed. Get a bottle or can, afix a line and hose to conect to the carb. and let it gravity feed. No need to even start the engine....see if the needle and seat hold the gas back with just gravity for pressure....or buy a vacuum/fuel pressure gauge for much less than you think and actually check the pressure. Would be intresting to find out if and how high it is.


Gene Schneider
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Dont rule out that the float could be a sinker!

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Well the answer was: the float WAS a sinker!
Thanks, Chris

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I agree with Gene. I had the same problem. Changed needle and seat repeatedly. My problem--Crapanol gas!! Cleaned everything and switched to non ethanol gas. Problem went away.

Check out www.pure-gas.org for a listing of non ethanol stations in your state.


Rick

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Originally Posted by glyn
Originally Posted by Junkyard Dog
Sounds like your new fuel pump is putting out too much pressure which would keep the needle from seating properly. Run a pressure test on your fuel pump to see how much pressure the pump is putting out.

laugh wink beer2
Not to worry the new fuel pump made by our friends in China is good for about 60/70 miles before failing. willy
Need to add to my comment by saying that often times when opening up a fuel line to change a pump or a filter we get dirt in the line which gets to the carb and causes problems. talk


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