Every car/truck I've driven  with vacuum-assisted brakes will do that Max.
The booster moves a little air every time you release the pedal, so you're
changing the mixture.

No problem.

On 9/25/07, Bob Donalds <donalds1@verizon.net> wrote:
>
> You have dual throttle bodys as I recall my guess is that you have the
> gauge on one side and the vac boost take off on the other
>
>
> Bob Donalds
>
>
>
> ----- Original Message -----
> From: "Max Wellhouse" <maxjoyce@IPA.NET>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Tuesday, September 25, 2007 3:36 AM
> Subject: Brake pedal/high idle issue
>
>
> > Hello Troops:  While sitting at a stoplight the other day, I was
> > repeatedly pumping the brake pedal(for lack of any pretty girls to
> > ogle at on either side of the Vanagon) and the idle increased about
> > 6=700 rpm before returning to normal.  I realize I may have been
> > screwing up the vacuum supply/demand chain there, but is this
> > something indicating a repair down the road, or do I just have a leak
> > somewhere that needs attention?  My VDO vacuum gauge on the dash
> > shows no change while I do this.
> >
> > Thanks
> >
> > DM&FS
>

--
Jake
1984 Vanagon GL
1986 Westy Weekender "Dixie"
www.crescentbeachguitar.com