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Old 11-13-2003, 04:08 PM
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G-Benz G-Benz is offline
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
A buzzing fuel pump is usually an indicator of impending failure...

...while many have gone on with a noisy pump and had no problems, if your pump used to "hiss" and now "buzzes" (and you notice problems when this occurs), it just might be the pump.

On the other hand, a faulty fuel pressure regulator could malfunction and briefly "starve" the fuel pump (hence the buzzing and hesitation).
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
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