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Fuel pump making a whining noise


Proven Member
Aug 31, 2009
Battle Ground, Washington
To start it out i just replaced my alternator, and now a couple hundred miles later my fuel pump starts whining and my idle is surging.. What could be causing this?? thanks for the help...

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Proven Member
Feb 29, 2004
Daytona Beach, Florida
The 255 will overrun the stock FPR. If there is a 255 out there that doesn't whine, I just haven't found it yet.


Proven Member
Dec 16, 2009
Indianapolis, Indiana
They all whine. But, you can make it quieter with the rewire. It is fighting for voltage right now using the stock wiring. Do the rewire and it will get a constant good voltage feed and quiet down a little, but you will still hear it. But, the rise/fall of the sound with turn-signals will go away.

If you have a NEW fpr, you will be ok. But, if you are running the original stock FPR, then you are running the risk of it being overrun. If you do not know the age of your FPR, then get an AFPR to be safe.

Archer Fabrications

Proven Member
May 9, 2011
Scottsdale, Arizona
The 255 will overrun the stock FPR. If there is a 255 out there that doesn't whine, I just haven't found it yet.

It doesnt really. I ran my 255 with stock fpr for months and months. But an afpr is a good upgrade reguardless. But it does not over run it. A 400 does.

A rewire actually makes it LOUDER because more power isngoing to the pump making it able to work harder. At least in my experience.
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