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Whistle noise from under hood 1999 5.4l

When i accelerate a whistle begins and gets louder as the speed is increased. almost sounds like a turbo spooling up but there is no turbo on a stock 5.4l

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6ya6ya
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SOURCE: Buick Lesabre Humming noise that becomes louder as RPMs increase

Bad Crankshaft Damper

Posted on Dec 16, 2008

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  • 7 Answers

SOURCE: poor acceleration on a fiesta

you could try looking at the hose connections on the tubo in case any have worked loose or a possibility the turbo it self has had it
but these are only my guess hope it helps you in some way
regards gr1o1

Posted on Mar 16, 2009

  • 1 Answer

SOURCE: whining noise when the engine running

Yep, That was it. i followed a link to trailvoy.com and found a video with the same noise and links to how to repair. My husband fixed it yesterday and the noise is no more!! Good Luck..

Posted on Apr 26, 2009

j_del
  • 1586 Answers

SOURCE: 2002 audi a4 quattro maintain acceleration problems

Likely a faulty diverter valve. If you have some decent mileage on the car the DV may be failing. It's a flimsy design with a plastic internal diaphragm. They're not terribly expensive (you can buy them at www.ecstuning.com or www.purems.com).

That being said, I'd still look around the turbo and intake systems for a loose, cracked, or disconnected vacuum hose - a vacuum leak should trip a check light but it may not always do so. Look for that, and if nothing is apparent, then I'd look at changing the DV.

Posted on May 01, 2009

  • 1 Answer

SOURCE: When I reach a speed of 30MPH I get a whistling noise

It is now sorted somehow the window had become slightly open and caused the wind noise.

Posted on Dec 05, 2009

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http://www.facebook.com/#!/pages/Kellers-Auto-Repair/158207620880499

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