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Old 10-01-2008, 09:20 PM
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Leaking booster-Holley Carb

Just wondering if anyone can make a suggestion as to why I have one, only one booster leaking fuel on the primary side ? The carb is a Holley 750 dbl pmp. sitting on a 350 Chev with trick flow heads, Edelbrock air gap intake, the vacuum gauge is reading at best 9hg, I have checked fuel pressure(about 5.5) as well I have checked and cleaned the fuel filters, re-adjusted the float to the proper level and still a leak out of one booster ? Im running a 6.5 pwr valve, I have experimented with a 5.5 and a 4.5 to see if anything worked, still leaking. The primary jets are 73's. The motor seems to idle pretty good at around 900-1000 rpm but I know this leaking booster is not right. Any suggestions would be great.

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Old 10-01-2008, 11:17 PM
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Sounds like fuel level in bowl- replace neddle/seat?? may be sticking open.
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Old 10-02-2008, 03:23 AM
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Odd to just have 1 side leaking? May have trash in the other booster circuit plugging flow. But does sound like a leaking seat or sticking float. Torn float seat or trash holding it open.
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