Aug 28, 2011
Hi, does the S3 have EGR? and where are the systems parts located if so.
I do not think it does as I cannot think of where it could be! Why do you ask?
I couldnt see anything when i had a look.
I ask as i have a leak noise when i give the car full throttle (like a kettle whistle) sounds like a boost or vac leak. checked all the boost pipes and connectors, replaced the O rings on the boost pipe and tightend all the clamps.done a vacom log and spec v's actual seems to meet. Could the turbo overboost to meet the specified if it was leaking??
Thought it might be the EGR leaking boost as i have heard of that on other cars but cant be that as it dosent look like it has one.
Could it be the wastegate not closing propely?
Also I have changed the PCV aswell. problem is still there
Take the recirc valve off and see if it has collapsed like this:
It won't look like that but the red cap in the middle might be cracked. What year is your S3?
Audi revised the diverter valve to a rev D - costs around £50 from Audi. I would recommend you get the latest version, even if it isn't broken or a forge recirc.
forgot to mention had a new rev. D valve fitted too. could check to see it was fitted properly but im pretty sure it is!!
also was making the noise before it was changed and made no difference with new one
Have you an intake on the car or the standard air box?
If you have an intake, check all the connection and to the turbo.
standard airbox. i took it off today to make sure it was all screwed up properly and as good with that
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