Whining on deceleration (why)

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Oct 31, 2006 | 01:55 AM

canadaina4

Thread Starter

Joined: 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

Oct 31, 2006 | 03:40 PM

Coop

Joined: Jul 2006

Posts: 310

From: Valencia, CA

RE: Whining on deceleration (why)

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

Nov 1, 2006 | 12:48 AM

dankhound

3rd Gear

Joined: Oct 2005

Posts: 2,646

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RE: Whining on deceleration (why)

Where does the whine come from?

Nov 1, 2006 | 03:46 AM

canadaina4

Thread Starter

Joined: 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.

Nov 2, 2006 | 12:40 AM

dankhound

3rd Gear

Joined: Oct 2005

Posts: 2,646

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RE: Whining on deceleration (why)

Maybe a bad diverter valve.

Nov 2, 2006 | 02:32 AM

canadaina4

Thread Starter

Joined: Oct 2006

Posts: 3

RE: Whining on deceleration (why)

diverter valve?

Nov 2, 2006 | 03:16 AM

Flip

Senior Member

Joined: Sep 2006

Posts: 2,634

From: Lancaster, PA

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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