Quote:
Originally Posted by Mad1723
That sounds like you have a bad bypass valve actuator. Check the Edelbrock thread, plenty of information on this there, not a tune issue.
Pinch the little hose at the back of the blower, if the idle fluctuates whilst you're pinching, you got your culprit.
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I appreciate the feedback. That is what it acts like but I tested the valve and it doesn't have issue. The actuator holds vacuum when I put a draw on it.