[s-cars] Idle stabalizer valve (ISV) - how does it work?

[David Forgie]

Chris and others:  I posted these "official" explanations on AudiWorld:

http://forums.audiworld.com/s4s6/msgs/230062.phtml

and 

http://forums.audiworld.com/s4s6/msgs/230066.phtml

Dave F.