O.K., THANK YOU ! I have this thing too and no one seems to know what it is nor how it works, elucidate me/us please as you learn .

The wastegate is _underneath_ with a short rubber hose on it, disconnect the hose and see if the wastegate holds vaccum ~ it must else it won't work right and will bleed off *some* boost .

I now have boost, plenty of it but no waste gate function and don't want to touch this air recirculating valve until I know what it does , how and why .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better