Larry;
        These are easy to test. There is an internal disk with a hole in
it. When the hole lines up with the inlet air can flow and bypass the
throttle body. This also a higher idle while cold. When 12 volts is
applied an element heats up and rotates the disk to close off the air
passage.
        First I would check the resistance of the element. I would
suspect less than fifty ohms. If that is good I would apply twelve volts
to it while on your workbench. After about ten minutes the passage should
be closed.

Drive Safely & Good Luck
Ken Lewis    <Kernersville,NC>
86 VW crewcab;60 356B Coupe
--------------------------------------------------

On Tue, 14 Mar 2000 15:42:18 -0600 Martin <nitram@TBCNET.COM> writes:
>Y'all,
>
>    My 1.9L idle started to run high & erratic 1000-2000 rpm.  I
>checked for
>vacuum leaks, found none.  Did the check for the aux air valve and
>volia -
>according to Bently that was it.  I tried to clean it with no luck so
>bought
>a new one.  Just installed it and the same thing is occurring.   I did
>clamp
>the hose from the aux valve to the throttle body while waiting for the
>valve
>and it ran great , even cold. ( 23.5 mpg combined (USG)) .   So I
>re-clamped
>the hose closed and await your wisdom.( the harness is giving 13.5 v
>to the
>aux air valve with engine running)  Whats the chance of a bum new
>valve?
>
>Larry
>85 Van
>87 soon to be Tii conversion
>72 Beetle

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