Editing Holley accelerator pump (section)
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==Primary or secondary== On a double pumper, the side of the carb (primary or secondary) having the problem can sometimes be found by disconnecting the secondary throttle linkage to allow the carb to run on just the primaries. If the problem associated with the accelerator pump goes away, it can be surmised the problem lies with the secondary side. This is useful because while a problem with the secondary pump delivery can sometimes be "cured" by going larger on the primary side, going larger than necessary on the primary side hurts the economy and can cause the carb to not be as 'crisp' as it could be, even though the hesitation is gone.
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