Where does this go?
 

Service engine lights on, car runs like crap. The turbo's blowoff valve control (i think thats what this is) has a black hose coming off the nipple shown below, but the hose was not connected on the other side. intake manifold shows all nipples already used (at least from what i can see). Where does the other end of the hose connect to?

Hose has been removed for the picture:
http://img143.imageshack.us/img143/6815/1000431t.jpg

The red hose below is the hose i am talking about:
http://www.matthewsvolvosite.com/ima...iagram-850.jpg

Cbv
 

That's your CBV (Compressor Bypass Valve). It redirects air back into the intake when you let off the throttle while in boost. The other end should go on the bottom (3rd one down) on the side that is closest to when standing in front of the car. As for all of the nipples being already occupied, just try to follow them and see where they go.

Attachment 19180

thank you, car is making a lot less shuttering noise after the throttle is let off with the hose hooked up. Just found ive got a rpm sensor and egr issue :/

Just as an extra help to me, can you diagram (or just label) more of the hoses coming off the intake for me, please? I'll be replacing my intake gaskets soon and it will save me some trouble.