Holley carb off idle bog/hesitation

[Jeff H]

Thanks for the suggestions. I checked the secondaries and they look fine, the squirter looks to be spraying nicely, the timing is in good shape and I played with float levels and the pump adjustment. I can feel some wiggle in the primary shaft so at this point I'm guessing that's my problem.

[SuperNovaSS]

Was there a hesitation with the old carb? If not, I would rule the timing and advance curve out. Try spraying some carb cleaner on the outside of the throttle shaft, if the idle changes there is a problem there.


Jason

[68Biscayne427]

Not to alter the subject here too much but how is your vacuum advance connected? Is it connected so it receives "full manifold vacuum" or is it connected so it receives "ported" vacuum. I recently moved my vacuum advance connection from ported to full manifold vacuum, and this help in my stumblingly problem. This also made a huge difference in the overheating problem that I was having at idle. Any comments or ideas on what is going on here?

Thanks - Rob