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I just put new bowl gaskets in my holley carb, it had been setting for a year or so off the car and when I put it back on it had a bad fuel leak front and back. now the leak is gone but the carb is running weird, its to rich, black smoke out the exhaust, if I turn the idle adjusting screws in all the way it runs better/smoother, no hint of dying. this carb ran perfect the last time I had it on the car, whats wrong now? also the only other thing I changed was the power valve from a 8.5 to the 6.5 that came with the rebuild kit.
 

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Did you change metering block gasket's if they shrink up they will let gas run in and act like blown power valve, wrong gasket will do same thing.

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Rodney Colbert
ACES#01881 TC#652
70 L78 M21, fathom blue with pearl interior Chevelle 68 RS/SS 350HP 396 RED with black top red interior 400 turbo factory air PS PB Camaro
 

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cortez, I had the exact same problem when I changed the gaskets on my holley. Turned out I had bought wrong gaskets for my carb. There is a difference. I would recheck the gaskets first.
 

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Geez ed why not just call me?? I see how you are
If you still need help just give me a call and ill find some time this week after work. CHRIS
 

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66 El Camino 57 Chevy pickup 2004 Tahoe
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Probably have the wrong gasket on the power valve or some other similar deal with wrong gaskets.

Tom
 
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