Thread: Carb Problem?
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Old 04-19-2003, 08:57 PM
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John A. Simpson John A. Simpson is offline
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Default Power Valve
David,

You may need a different power valve or your backfire may have damaged the existing power valve. The power valve opens at a specified vacuum level to admit more fuel, if your car doesn't make much vacuum (less than that required by your particular p valve) the power valve will open creating a rich condition, a blown valve will do the same thing but both should clear up at higher rpm when they would normally be open. Is your fuel pressure OK, 5-7 psi, if its too low you may have a miss, if its too high the pressure can override the needle/seat assembly and be too rich. I don't know of a simple test for power valve integrity without removal.

See you Friday

John
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