Dorman 904-214 and a reservoir should take care of the vacuum problem. Many
Diesel and turbo vehicles use pumps like this for cruise and climate control
systems.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Mike B
Sent: Sunday, November 04, 2012 7:53 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: troubleshooting Audiovox Cruise Control

The electric pump in VW / Audi engine compartments is for factory cruise
control only.  The "bi-pressure" two-way pump in a VW/ Audi trunks (inside a
foam package for quiet operation) is for vacuum-operated power door locks.
Neither of these will work with the  aftermarket cruise control.

Mike B.

On 11/4/2012 7:23 AM, Larry Alofs wrote:
> If you are installing or troubleshooting a vacuum powered system you
> should realize that late model vanagons have a vacuum pump rather than
> stealing from the intake manifold.  I owned a '91 for a number of
> years before I noticed the pump and realized what it was.  I have
> found the same pump (in the trunk!) of Jettas of similar vintage.
>
> Larry A.
>