Quote:
Originally Posted by Formulajones
Correct, very common misconception.
Power valve will not dump fuel until the transfer slot is open triggering the main circuit. So as long as your throttle blades are adjusted properly at idle, you will only be running on the idle circuit no matter what your vacuum power valve is.
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Take your power valve out sometime and let me know how the car idles. In theory, it shouldn't matter but if your car has a long duration cam and low vacuum and you are overlapping the idle circuit to the off-idle circuit or cruise circuit, it will flood.