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Author Topic:   Carb
posted August 06, 2003 08:12 AM
The carb I have on the car that is just now getting completed is having issues. I'm relatively ignorant of these things, so that's why I'm coming here again! The float is staying open from time to time, resulting in fuel ending up on the intake. What causes this? What are the fixes if any? Thanks!


posted August 06, 2003 08:29 AM
could he have to high of fuel pressure?

posted August 07, 2003 06:59 AM
My float was staying open one time after I rebuilt it.
What I found was the little tab on the back of the float that the needle rest on needed to be bend up just a hair.

We were getting so much fuel that is was coming out of the vent tube like a drinking fountain.

Also check your float, if it's the brass type take it out and shake it.
See if there is any gas inside it.

posted August 07, 2003 10:40 AM
Does the problem happen after you shut the motor off, or at idle? if it's when you shut the motor off, try this.

before you turn the motor off, close the gas shut off valve. let the car idle for about 30-45 seconds. turn motor off. if it does not leak fuel, you probably have too much fuel pressure. a fuel pressure regulator will fix that problem, installed after the fuel pump and before the carb.

[This message has been edited by avila (edited August 07, 2003).]

posted August 07, 2003 02:55 PM
Ok, it's not doing it now. I did find out, however, that when idling, it will eventually die. After re-firing, it'll blow smoke out the wazoo, then go back to idling. It's idling at around 1300 right now. It's very responsive, and as long as I pop the throttle from time to time, all is well. Any other thoughts? Thanks guys.

posted August 07, 2003 03:08 PM
What is your fuel pressure at idle, where do you have your floats set at?

Is this alky or gas?

jhon hollomon
posted August 07, 2003 04:56 PM
It is gas. I help him with it a bit. I do know that he doesn't run a fuel pressure gauge but he has a stock pump on it.

[This message has been edited by jhon hollomon (edited August 07, 2003).]

posted August 07, 2003 11:34 PM
Either the needle valve is sticking, or the float is set too high, allowing the engine to flood...hence the smoke after it stalls and you re-fire it. (assuming that the smoke is black)

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