2007 Bmw 328xi Automatic M Getting Whistling Sound While Decelerating Happens

2007 BMW 328XI
73,000 MILES
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CAHILL.JOSEPH
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2007 BMW 328xi automatic. I'm getting a whistling sound while decelerating. Happens when gas level is lower than 1/4 tank. The whistle/whining sound stops when even slightly tapping on accelerator. Also don't hear the noise when I add gas to the tank to bring it over 1/2 tank. Car has 73000 miles on it and changes gears smoothly with no other problems. Noticed slight lose in MPG as well.
Mar 2, 2013 at 2:24 PM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
Possibly an internal fuel issue in the tank, maybe the siphon pump is the culprit or its just a noisy pump.
Mar 3, 2013 at 4:02 PM
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