From: "Geza Polony" <gezapolony@SBCGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, June 20, 2007 8:48 PM
Subject: Re: Aux Air Valve becoming available as reman

> But the aux air entry into the throttle body is before the butterfly
> valve.
> Wouldn't the butterfly valve control the air flow no matter what you
> inject
> on the other side?

Humm... I'm talking about the aux air regulator that exists on air-cooled
Vanagons.  This "plumbing" for this regulator is as follows: hose from "S"
boot allows metered air to pass to the aux air regulator which then allows
this air to pass into the air distribution box which is *after* the throttle
body.  There's no entry point for air from the aux air regulator into the
throttle body itself.

When the aux air regulator is open there's another pathway for metered air
to enter the engine.  When the aux air regulator is closed then the position
of the butterfly valve alone controls how much air is allowed into the
engine.

Tom Young