Carburetor Leaks Down.


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By timmy4 - 17 Years Ago
I finally got my y block started after a few problems like accidentially put wires on new cap in the right order but one hole over, and the carburetor power valve was leaking fuel in to the engine I had to change the oil and replace the new gasket it seems that when you tighten the power valve the gasket rips. I put a plastic one in there and I filled the bowl with the carb off and it does not seem to be leaking but after I start the car and shut it off the car does not start unless you hold the throttle to the flor. I rebuilt the carburetor and bought a new fuel pump but it still seems to flood. 
By Hoosier Hurricane - 17 Years Ago
Timmy:

What carburetor do you have?

John

By timmy4 - 17 Years Ago
John I have the carburetor which has a rount top where the air cleaner fits and the carb bolts on to the intake on 3 studs. I can't see the name of it thanks
By Hoosier Hurricane - 17 Years Ago
Timmy:

I have heard those carbs are sensitive to fuel pressure, don't like more than 3 or 4 psi.  When you shut the engine off, look down the throat and see if gas is dripping from the fuel nozzles.  If so, then look at too much fuel pressure or a leaky needle and seat or too high a float level.  If you see no gas dripping, then it still must be a leaky power valve.  The gasket may still be leaking, or the diaphragm could be damaged.  Has the engine backfired?  That can rupture the diaphragm.

John

By timmy4 - 17 Years Ago
A friend looked down the carburetor and he did not see any dripping and the engine did not back fire thanks.
Hoosier Hurricane (5/8/2008)
Timmy:

I have heard those carbs are sensitive to fuel pressure, don't like more than 3 or 4 psi.  When you shut the engine off, look down the throat and see if gas is dripping from the fuel nozzles.  If so, then look at too much fuel pressure or a leaky needle and seat or too high a float level.  If you see no gas dripping, then it still must be a leaky power valve.  The gasket may still be leaking, or the diaphragm could be damaged.  Has the engine backfired?  That can rupture the diaphragm.

John
By timmy4 - 17 Years Ago
Hi John it says ford on it it is the type with a round top and it goes on 3 studs on the intake