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Reply to "Holley carburettor adjustment needed"

...If it has Backfired Through the CARB...Just One Time, You have a Blown 'Power Valve' RUBBER Diaphragm on the Primary Metering Block. Too Much Fuel, Flooding Out! If it is a 'Double-Pumper', there is also a Power Valve on the Secondary Metering Block! Check/Test these by Removing and Sucking on them...No Kidding, they should 'Hold' the Vacuum.

MJ

Last edited by marlinjack
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