Strange noise when I let off accelerator??? - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 05-16-2012, 08:48 AM Thread Starter
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Strange noise when I let off accelerator???

Hey guys I wasn't sure where to post this so I figured it would get the most exposure here, so here it goes. Well Im driving my truck today and I started hearing a strange noise when I let off the gas going about 45-50 mph. The only way I can describe the noise is it sound like static or wind noise coming from the engine compartment. The noise seems to cut in and out when I am decelerating. And as far as I can tell it does not effect performance or drive ability.I know the description of the sound sucks but I was a front end tech for 6 years on gas cars and I have never heard a noise like this. Any help would be awesome.
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post #2 of 10 Old 05-16-2012, 08:51 AM
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Waste gate...


Sent from my Autoguide iPhone app
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post #3 of 10 Old 05-16-2012, 04:51 PM
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You have a turbocharger spinning at very high RPM... that air has to go somewhere when you let off the pedal...

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post #4 of 10 Old 05-16-2012, 05:57 PM
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Lemme guess, like a whooooosh? Should be alright.

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post #5 of 10 Old 05-16-2012, 06:15 PM
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Quote:
Originally Posted by arcticatman92 View Post
Waste gate...


Sent from my Autoguide iPhone app
no....................
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post #6 of 10 Old 05-16-2012, 06:31 PM Thread Starter
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Nope. I know what a wastegate sounds like. This noise is continuous, the wastegate just goes woooish. This noise happens when I let off the gas going about 45-50 mph and goes on until about 15 mph.
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post #7 of 10 Old 05-16-2012, 06:45 PM
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you will never hear the wastegate, ever
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post #8 of 10 Old 05-16-2012, 06:49 PM
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It's the worlds quietest waste gate so you won't hear it all it is the built up boost going back out through the air filter

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post #9 of 10 Old 05-16-2012, 06:57 PM Thread Starter
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Its just weird, I havent heard it before. It doesnt sound normal to me. So when I let off the gas under easy accel its normal for the boost to just bleed down the whole time you are decelerating? I mean its a very noticeable noisde.
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post #10 of 10 Old 05-16-2012, 09:43 PM
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I hear that in mine after installing the 6637 filter, but didn't with the stock air box. I'd assume the stock box muffled the sound.
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