Holley carb off idle bog/hesitation - The Supercar Registry

04-08-2007, 03:32 PM

Rixls6 Rixls6 is offline

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Re: Holley carb off idle bog/hesitation

I had a 780 vac secondary doing the same thing once.
Mine turned out to be a small vacuum leak at the throttle shaft.
With the carb still on the engine, not running, open the accelerator slightly, then try to wiggle the shaft up and down/ back and forth. If you feel movement, it probably will leak vacuum there.

I put a new throttle plate on mine and the off idle stumble was gone.

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69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.)
69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan

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