Vacuum line missing?

[Huw Powell]

> >http://forums.audiworld.com/4000/msgs/6800.phtml
> >
>
> That valve might be used to direct a little extra vacuum over to the vacuum
> advance unit to help keep the idle up when the AC compressor kicks in.

I suppose it could be for that, but it's not.  It's to open the A/C air
inlet flap.

There is an ISV to control the idle rpm, and the ECU gets told when ac
is on, to expect the need for a bit more air.

--
Huw Powell

http://www.humanspeakers.com/

http://www.humanthoughts.org/