Whining on deceleration (why)

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10-31-2006, 01:55 AM

canadaina4

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Join Date: Oct 2006

Posts: 3

Whining on deceleration (why)

Noticed on deceleration in cold weather my 97 A4 1.8t makes on whining sound.... Does anyone know why

Thanks Shayne

10-31-2006, 03:40 PM

Coop

Join Date: Jul 2006

Location: Valencia, CA

Posts: 310

RE: Whining on deceleration (why)

turbo noise??? how many miles? what kind of trans?

11-01-2006, 12:48 AM

dankhound

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Join Date: Oct 2005

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Posts: 2,646

RE: Whining on deceleration (why)

Where does the whine come from?

11-01-2006, 03:46 AM

canadaina4

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Join Date: Oct 2006

Posts: 3

RE: Whining on deceleration (why)

the car has 170km so about 120 miles it is more of a high pitched whistle about when the turbo would blow-off. Manual trans.

11-02-2006, 12:40 AM

dankhound

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RE: Whining on deceleration (why)

Maybe a bad diverter valve.

11-02-2006, 02:32 AM

canadaina4

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Join Date: Oct 2006

Posts: 3

RE: Whining on deceleration (why)

diverter valve?

11-02-2006, 03:16 AM

Flip

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Join Date: Sep 2006

Location: Lancaster, PA

Posts: 2,634

RE: Whining on deceleration (why)

A diverter valve is the valve that releases excess turbo pressure back into your engine to be re-used. It is like a blow-off valve.

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