Thread: Holley won't idle

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Originally Posted by 53 Willys

I just switched from a 600 to a 670. I can adjust the idle to the lean side and make it stumble, turning the screws out to fatten it up ,it never get to a rich point. Second problem is a dead spot rigth of idle on fast accel. The accel pump is working .

I would set your idle screw's with a vacuum gauge for the most vacuum.
Are you sure you don't have a vacuum leak somewhere?
If you have a flat spot try a different acc. cam position.
Is the spring to tight on the arm or to loose?
Holley sell's the "cam kit" with the different size and different shaped cams.
There is always the different "squirter" sizes also.