Exhaust Valve Mod

Bensb93

Bensb93

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Hi All,

Not sure if this has been posted before but curious whether there is a valve mod with the exhaust to keep the valves open at all RPM.

Is this done via VCDS? Or done manually with wire?

Just after a bit more noise really, I find the exhaust has a really muffled sound which sounds like a vacuum almost lol! :suspicion:

Ben
 
it can be done via VCDS ( i know S3 8V adaption, not sure if its the same for the S1)
i just disconnected them on the S3 though!

engine off, and they're open. so disconnect that, and when you start the engine, they won't close.
 
RO65ERS said:
it can be done via VCDS ( i know S3 8V adaption, not sure if its the same for the S1)
i just disconnected them on the S3 though!

engine off, and they're open. so disconnect that, and when you start the engine, they won't close.
Click to expand...
do you know this for sure ? the valve is open with engine off ???
 
gingers3 said:
do you know this for sure ? the valve is open with engine off ???
Click to expand...

Yup.
It takes 5 minutes, go try it. Soon as you start it up, you'll hear a difference!

It's how I opted to do it on my s3.
I had an s1 prior and planned on doing it but got rid of it after a month
 
does it not bring up any faults with it un plugged ?
 
gingers3 said:
does it not bring up any faults with it un plugged ?
Click to expand...

Scottien said:
Yes will bring up exhaust flap fault
Click to expand...

No EML light, but it will store a code when checked via diagnostics equipment / main dealer / VCDS etc.
if i need to take mine into the dealers for anywohk, i will plug them back in and then clear the codes.
 
Sorry for resurrecting this thread but I'd like to make this mod to my S1 but without any errors being report via VCDS at the dealer. I think I read on Facebook that another mod is to remove the spring from a box under the rear left corner of the car - does anyone know this or the steps to take ?

Thanks
 
I have disconnected the connection for the valve, it's a simple clip. No warning lights on the car, however I don't know whether this will bite me in the backside when it comes to returning to the dealer?
 
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Thanks for the reply.

So did you notice the increase in exhaust noise ? I read on here that the dealership will be able to see that it's been disconnected via their software - however if it's your car (mine is not leased) I could discuss it with them if they mention it.

I'm interested in the mod made to the actual piece of kit under the rear left of the S1 - I messaged the person from the Facebook page who posted a mini guide a while back. If he can let me know the steps i will ask if he's happy for me to share it on here.
 
You can unplug the valve (do it with the engine off). It will show a fault, but if you tell the dealer you've unplugged it they will know not to report it, it's not going to cause any other faults
 
Thanks DomH - I might do this tomorrow then, is the plug next to the control box ?

If so I will seal the plug up best I can and then zip tie it inside a waterproof bag to try and protect it. Did you notice much difference in the exhaust noise ?
 
audi upgrades
Yeah it's just a plug, you have to pull the small grey tab back first as it acts as a lock for the connector

As for the sound, it sounded a little louder at idle, but the only noticeable difference in noise was in efficiency and auto mode, dynamic was the same
 
I found a post about the exhaust valve control unit on a French Audi site, some of you may have seen a post on a S1 Facebook page as well by the same author.

A friend of mine has translated it from French and I will try and give it a go this weekend if I get the chance - if it works I could post a step by step and credit the original author :)
 
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