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I can hear my fuel pump from both the left rear tire area, as well as from anywhere inside the car. You don't even have to strain to hear it, just with the radio down and the car not moving. The only thing in relation to the fuel system I have modified are the 550cc injectors with PowerAxel tuning. All I can describe it as is just the pump working...it's not roaring or whining or anything. Almost sounds like a treadmill going very very slowly. Is this normal?
 

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Not really, only ever so slightly if you are listening pretty hard for it outside the vehicle or with the rear seat bottom out.
 

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Mine is very loud when priming the system before I start the car. After that I haven't heard it.
 

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you should be able to hear it prime...not any time else tho
 
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