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Can you blow a power valve in a holley carb with a blow proof power valve installed Motor is new and runs rich its a 67 Pontiac and I bough a carb with the blowproof valve has backfired a few times?

Anonymous

∙ 16y ago

Updated: 10/27/2022

According to holley they say you can't blow the power valve now so if your car is running rich maybe the carb is too big for the engine or you need to change the jets in the front venturi's to the next smaller size.

Wiki User

∙ 16y ago

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