Whats this bit on the airbox?

[Grae W]

Audi 1.8 T Sport 2001

Only had it a few days, and just taking a closer examination under the bonnet. The previous owner has taped up something on the corner of the airbox - any idea what it is and why he might have done it please?

 

[<tuffty/>]

Secondary Air Injection feed... guessing your SAI has been removed...

<tuffty/>

 

[Grae W]

Ok thanks. Could explain why it failed on emissions on its last MOT before passing?

 

[<tuffty/>]

I doubt it, SAI is used for emissions on coldstart really...

MOT tests are done on warm engines... if the cats weren't up to temp then it would most likely fail initially...

<tuffty/>

 

[Grae W]

Ok, thanks for the advice!

 

[blackshuck]

OK, what's an SAI?

 

[<tuffty/>]

Secondary Air Injection...
Secondary air injection - Wikipedia, the free encyclopedia

<tuffty/>

 

[blackshuck]

Oh that SAI!.....lol







Thnx

 

[blackshuck]

I have a Neuspeed induction kit (pictured) and you can see a smaller filter to the bottom left is that for the SAI?
It's currently disconnected, should it be connected?

 

[blackshuck]

Ok not pictured it won't upload

 

[blackshuck]

Here you go!

 

[<tuffty/>]

The SAI draws filtered air from the airbox... the neuspeed heat shield has a place to connect SAI when you replace the std air box and supplies a filter (the little one) to retain functionality... if you have still got SAI then it should be connected...

<tuffty/>

 

[blackshuck]

How do I know if I have one? I will have a search for pics & location, thanks

 

[blackshuck]

By the way what is the advantage of removing it?

 

[<tuffty/>]

http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/88299-sai-removal-guide.html

Removing it isn't that necessary and depends on the level of tune... if you have a decat then its function is no longer required... most peeps remove it to tidy up the engine bay and have less things that could go wrong...

<tuffty/>

 

[blackshuck]

Thanks Tuffty!