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Old 10-23-2010, 12:31 PM
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Holley carb spitting fuel

I went out to start my car this morning and it wouldn't start. My 4 year old looked under it and said "Daddy, it's leaking". I opened the hood and saw fuel all around the carb. Took the air cleaner off and everything was wet. I hit the starter and fuel was shooting up out of the sec bowl vent. I removed the carb and that bowl and the needle. I shot cleaner through the needle, no problem and it moved fine. The float is a sold plastic one with no fuel in it. I cleaned it all up, set the float and reinstalled. It still is shooting fuel up. Nthis carb is a Holley 750 CFM.

I have a Holley 600 and a rebuild kit for it so I am going to try that.

What else would cause this to happen? I am going to do a complete rebuild of it but would like to know what to loom for during the teardown.

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Old 10-23-2010, 01:28 PM
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The needle is leaking or the float is binding. That is all that can really cause excessive fuel.
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Old 10-23-2010, 01:54 PM
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Quote:
Originally Posted by T-bucket23
The needle is leaking or the float is binding. That is all that can really cause excessive fuel.
I agree. If you installed a new fuel pump I would say that the psi is too much and over powering the needle/seat, but doesn't seem to be the case here.

What kind of fuel pump do you have? Sometimes when they go or start to go bad can do some weird stuff.

Do you have a fuel pressure regulator? I had one of those little cheapy in-line deals and it gave me all kinds of throttle before I found it. Got the Holley regulator and have not had any problems since.
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Old 10-23-2010, 02:02 PM
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fuel prob

Not to many choices if you have an elect pump it could be reg as listed, or nnedle and seat, it was leaking when not running so not reg. Normal to have needle/seat problems on Holleys.
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Old 10-23-2010, 04:01 PM
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Why not put a kit in the 750?
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Old 10-23-2010, 09:46 PM
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I rebuilt the 600 and it runs fine. I needed to rebuild the 600 anyway and I had the kit on hand. I will rebuild the 750 in the next few weeks. I had been wanting to put the 600 on it to see if I could feel a power loss anyway. For normal driving around it feels the same. I am thinking the main diff is going to be WOT type driving.
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Old 10-24-2010, 09:13 AM
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Quote:
Originally Posted by glennsea
I had been wanting to put the 600 on it to see if I could feel a power loss anyway..
LMAO.... First time I've ever heard that one.
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Old 10-25-2010, 10:16 AM
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Yea, it's too strong, I need tone this thing down some.
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Old 10-25-2010, 11:17 AM
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What kind of car we talking about anyway?
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Old 10-26-2010, 06:57 AM
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65 Chevelle.
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