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- - The stange sound of a Audi (https://www.audiforum.ca/general-audi-discussion-44/stange-sound-audi-72004/)

Zonk	04-28-2014 07:51 PM

The strange sound of a Audi

Hi
Many months ago i was sat at a terrasse and i saw and heard a Audi ,probably a A4 or S4 , and this car had a kind of strange and cool sound . The sound was like some compressed air valve open when the shift gear changes. I have no idea what is the cause. Do you know something about it?
Bye

a4audi4fun

05-06-2014 10:28 PM

Re: The strange sound of a Audi

Likely a blowoff/venting valve on the turbo system. That particular feature is not recommended for our cars. The Audi turbo system is designed as a closed loop system so boosted air is not vented but recycled when the throttle is closed.

Zonk	05-11-2014 06:46 AM

Re: The stange sound of a Audi

Hi a4audi4fun
Sorry for the delay. What i heard seem to be a blow off /venting valve . Some people said it become rapidly annoying cause the sound is loud in the car .
Thx a lot
Bye

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