
Audi A4 B6 Fixing Common Vacuum Leaks (2002-2008
1/9/2021· 2006 A4 1.8T: I replaced part of the breather hose system due to deterioration, that goes from the valve cover breather down under the intake manifold. It still idles rough with a 17705 check DV code. I don''t notice any obvious vac leaks. When the vacuum hose leading to behind the throttle body is pinched closed with pliers, it then idles fine. This same vac hose …