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2004 Ford Expedition whining sound

Tiny
LACVIEUXPHARM
  • MEMBER
  • 2004 FORD EXPEDITION
Noises problem
2004 Ford Expedition Four Wheel Drive Automatic 98,000 miles

help! I have been noticing lately that whenever I step on the gas pedal I hear a high pitched whine. If I let off the gas the noise goes away. Any idea what it could be?
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Friday, August 20th, 2010 AT 10:22 AM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Things to check: Pulleys, tensioner idler, alternator, and A/C, remove the serpentine belt, spin the pulleys by hand, any roughness or binding means replace! The other problem makes more of a honking than a whine, but if the air duct from the filter to the throttle body has a crack, strange sounds will be heard, Ford also notes that the IAC(idle air control)valve can produce honking if it needs replacing. Does it do it in park as well as driving?
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Friday, August 20th, 2010 AT 10:53 AM

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