Vacuum pump for cruise control?

[Huw Powell]

> Also, isn't that vacuum system connected to the intake manifold through a
> check valve to prevent boost from getting into the vacuum system? If that
> check valve was bad it could create a leak into the intake manifold that
> you would never see with a bubble test.

The cruise systems all have their own electrical vacuum pump, no 
interconnection with manifold vacuum at all.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/