Whirring noise - Fuel Pump?

[Guest my3buicks]

From day one I get this whirring noise when driving from the rear of the car - I have assumed it was the fuel pump. It usually does it but not always, and only does it while driving, not sitting - I have noticed lately the whirring is getting louder to the point of becoming annoying at times.

Anyone ever have their Reatta's fuel pump make a variable whirring sound when driving?

[padgett]

Had Fiero's do that (same pump), means the bearings are getting rough, figure on replacing soon.

[Ronnie]

Just a guess here but... you could have a brake pad slightly worn down to the metal? They make a similar sound to what you describe when no pressure is applied and the car is moving. When you get on the brakes hard you should hear a grinding, squeal or chatter if they get worn badly. Check for a parking brake cable not releasing properly as well. And as Padgett said, it could be a bearing.

Whatever parts you will need to fix it, brake pads, bearings, etc. are available in The Reatta Store.

[Guest my3buicks]

Definitely not brakes, not that type of sound plus brakes are all in good shape. This is a definate mechanical variable wharbble whirring sound,

[Rawja]

You sure it's not a wheel bearing?

[Guest reattabry]

I would take a look at the rear wheel bearings if the noise is only there while moving it is not likely the fuel pump.

Does the noise change while turning like on a curve in the road

[Guest my3buicks]

No, I have tried the wheel bearing check methods, does not affect the sound. This noise will stop and start at times also.

[NCReatta]

The power antennas in these cars create a good amount of wind noise.

[Guest my3buicks]

It's down, lol

[Guest Corvanti]

try it in park and get the rpms up over 3000 for awhile. if you can duplicate the "noise", that would rule out brakes, wheel bearings etc.

[padgett]

If all else fails check the fuel rail pressure, might be the regulator not regulating and loading the pump. Has MPG gone down ?

[Guest my3buicks]

yes, mpg has gone down

[smithbrother]

Have you changed tooth paste recently. Lots of strange advise, so consider mine, LOL.

Dale in Indy

[padgett]

What I was thinking was that a regulator that is not working properly (we have had a few) could be causing the pressure to rise above normal which would increase the load on the fuel pump. Too high a pressure could also case the injectors to run richer which would affect the MPG. In that case the BLM and/or Instantaneous would be reading under 128 when you hear the pump.Is also why I use only AC Delco fuel pumps, have had an aftermarket pump in a Fiero make that kind of racket from day one but did not affect MPG.