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Bog or Stumble off idle

3693 Views 7 Replies 5 Participants Last post by  tjstarduster
I had my Holley 780 rebuilt a few months ago and I've noticed the car has developed somewhat of a bog, or stumble off idle as I'm letting out the clutch. After a second or two, the engine catches and the revs go up.

Any idea what might be causing this? Carb idle mixture screws or accelerator pump?
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Thanks everyone for the suggestions. Appears to be an accelerator pump adjustment required. It only happens when coming off idle slowly to pull away from a standing stop. No problems whatsoever with WOT or aggressive acceleration. The only problem incurred then is keeping the rear tires from going up in smoke :)
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