Hi everyone. I have a swapped out stock pump for a EVO pump. Lately I have been experiencing a problem with my fuel pump priming. It used to prime really loud just before I crank the car. Now I can hardly even hear it priming but the car does crank over. Occasionally on the 2nd crank. Is there a problem with my pump? Will a dirty fuel filter cause this? What about poor grounding connections relating to the pump? Will an old battery cause this? My battery is about 2.5 years old.

 

whats wrong with the stock pump?

check the things you mentioned. the voltage of the battery, alternator, pump, new fuel filter and see what you get

 

I doubt the Fuel Pump is Bad... it is most likely something with your battery or Ground...

 

Which are the critical grounding points relating to the pump?