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Old 04-30-2014, 08:12 PM   #2
geezer#99
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Join Date: Aug 2009
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Re: Too Rich: SBC 670 Holley Street Avenger

Hook your vac advance up to manifold vacuum, your idle and vacuum will come up, turn down your idle and adjust your mixture screws. Presently you're likely idling on the power circuit and with a low vacuum your power valve could be opening.
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