Question about Ford Cars & Trucks
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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Posted on Jan 02, 2017
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
Posted on Mar 16, 2009
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
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
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