carb problems
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Junior User
Joined: Feb 2003
Posts: 54
Likes: 0
From: louisiana
carb problems
i got a holley carb i forgot the number but it is 600 cfm vacum sec..ok i bought it new run it on a older ford engine for a while it ran grat but a few times afterwards had a few backfires and it started to mess up..what happen it seemed it runs then it starts pouring gas out of the top of it toward the to-p front of the carb..would anyone know could this be the powervalve?..blowed..or is this something else..thanks
Elder User
Joined: Dec 2002
Posts: 925
Likes: 0
From: Quaker Hill ,CT U.S.A.
carb problems
I think the gas pouring out is the float adjustemt , holleys are hit or miss somtimes they need a adjustment out of the box somtimes they dont .
Rule of thumb is set the float that way it is correct for the other adjustments .
You also said that it was back fireing . First correct the engine base timing and then mess with the carb .
Some holleys come from the factory with the powervalve blow out protection so you may want to check the numbers on the carb to see if it has the protection .
I would buy a new power valve and replace it AFTER you fix the engine timing .
Rule of thumb is set the float that way it is correct for the other adjustments .
You also said that it was back fireing . First correct the engine base timing and then mess with the carb .
Some holleys come from the factory with the powervalve blow out protection so you may want to check the numbers on the carb to see if it has the protection .
I would buy a new power valve and replace it AFTER you fix the engine timing .
Hotshot
Joined: Oct 2002
Posts: 18,488
Likes: 22
From: The Big, Oregon
carb problems
If you take the carb out of it to set the float level or rebuild it, check the underside. If you see something that looks like a little ball bearing trapped in a collar, the carb has a power valve blowout protector. If there isn't anything like that, you can install one. They are available from Holley direct, or anywhere that sells Holley carbs.
