650 Holley bogs out

daredevil said
its a new carb. dont holleys have power valve blow out prevention now

I didn't catch the "new" in his post. You are correct, if it's a new Holley from the factory it should have power valve blow out protection.

Dusterdon,

Yes, it would be pulling fuel at idle through the enrichment circuit.

70aarcuda is right, We need more information to try to help.