Deceleration Rattle

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Jan 21, 2008 | 09:07 PM

JoeAndre

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Deceleration Rattle

6.0 Turbo....when I take my foot off, I hear a sheetmetal rattling sound. Hit the peddle and it disappears....What is it????

Jan 21, 2008 | 09:27 PM

slowmans

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From: SE. MA

its normal...........

Jan 21, 2008 | 09:41 PM

JoeAndre

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But, it only started recently....?

Jan 22, 2008 | 05:54 AM

slowmans

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From: SE. MA

unless something is loose? They do have a similar sound when decelerating...

Jan 22, 2008 | 09:37 AM

drakul20us

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info on the truck. have you done anything to it? my truck makes a rattling noise when I take my foot off the pedal while foing 40 - 70mph, at high speed, high rpms and high boost. I think that it's just the intake cutting out. I would check all the boots on your intake plumbing, from the turbo throught the intercooler to the intake elbow.

Jan 22, 2008 | 04:11 PM

UGA33

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From: Cartersville, Ga

I had the same issue to around 35 mph rolling to a stop it would get a grinding/rattling noise. Next day, it was on take off too. Turned out to be my MBRP downpipe was sitting on a crossmember bolt which caused it all. If you have an aftermarket exhaust i would look to see where it is hitting.

Jan 22, 2008 | 05:04 PM

MPHorvat

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Joined: Nov 2007

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Does the fuel shut off upon deceleration (w/ manual transmission)? If I'm at a cruise and lift the throttle slightly, the tone remains basically the same. OTOH, if I lift off the pedal completely, it sounds much different, making me wonder if the computer shuts off fuel altogether, perhaps to aid engine braking or something like that.

Thoughts?
Mark