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I know folks have permanently bypassed the ballast resistor, does this affect the longevity of the pump at all or does it just quiet it down. Didn't know if I should bypass or replace.
The bypass resistor quites it down. At start up the FP gets full battery voltage, which drops during cranking to about 10 volts. Once the engine is running the system voltage goes to about 14 volts, and the ballast resistor drops that back to a lower voltage, similar to the starting voltage. It is OK to bypass it until you get a replacement. Some have done it permanently, I don't recommend doing it permanently.