Usually source is somewhere on intake manifold between throttle body and
cylinder heads, it powers the brake booster and probably a few other
components. My Diesel has a vacuum pump and I think it only runs the brake
booster.
On Feb 16, 2016 10:57 AM, "John Rodgers" <jrodgers113@gmail.com> wrote:

> Couldn't find much on bentley about this. How does the vacuum work. Source?
> Affects what systems? How?
>
> Would appreciate any istruction on this!
>
> Thanks.
>
> John
>