Re: Holley 750 double pumper rich/floods at idle
Yeah, check the power valve. The only way I know to do so it to "suck it" an see if it holds.
Not going to debate Tony's recommendation of a 050 powervalve, as it what Holley would tell you BUT you can run higher rated ones without them dumping fuel through the venturies if the whole carb is properly set up.
Use a 065 which is pretty much stock Holley. Likely its the one you'll find inside.
And I simply cannot imagine the engine pulling enough cfm at idle to move the secondary flaps at all unless something is amiss with the secondary vacuum system.
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