Question about 1994 Mitsubishi 3000GT

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1991 300GT Electrical Motor Noise in rear wheel wells

A sound like an electrical motor noise can be heard in the rear wheel wells even when the engine is not running, but the key is at the ACC position. It is not the Power antenna.
Any ideas and what kind of money are we talking about to fix it.

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  • mprescott78 Dec 16, 2008

    I have had the car for 18 years and never heard the pump running before. Why now?

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It's the electric fuel pump. That's normal.

Posted on Dec 16, 2008

  • kcfixya Dec 17, 2008

    Could be nearing end of life and getting louder as it ages. Hard to say without hearing it but if you aren't having any performance issues I'd chalk it up to age.



    Every older vehicle I've owned/worked on with electric fuel pumps outside the tank have that same whine. The mid/late 1990s chevy pickups were loud enough to hear even with the engine running.



    Newer vehicles place the fuel pump in the tank, which improves effiency and longevity. A side benefit is that the noise is dampened enough that you won't hear it unless you're underneath with an ear to the fuel tank.



    If you're concerned about it, a new pump is about $65. Change the fuel filter while you're under there for added peace of mind.

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