Hi Keith,

I have exactly the same problem. The intermittent 2000 rpm idle started when
I replaced some muffler parts and put a new oxygen sensor in.

My next step is to investigate that there are no leaks in the muffler
couplings.

Mine idles a bit rough to.

Keep me posted in what you find out.

Hans
Cumberland, Ontario

86 Westfalia (SlowPoke)

----- Original Message -----
From: "Keith Adams" <vanagon_syncro@TELUSPLANET.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, August 07, 2002 10:49 AM
Subject: help with function of idle stabilizer

> I have been trying to root out an intermittent high idle (2000 rpm) on my
86 2.1
> .
>
> - I have pulled the control unit for the idle stabilizer out from behind
the
> tail light and opened it up.  It is less than 3 years old form the
receipts I
> have from the PO and it looks all shiny and new inside still
> - I have changed the idle stabilizer valve with a spare that I have.  No
effect.
> - the Temp II sender was changed last year (maybe year before) - could it
be
> bad?
> - the idle position switch on the throttle body seems to be working fine
and
> clicking at the right spots.
> - disconnecting the idle stabilizer valve seems to fix the high idle.
>
> How do you test the idle stablizer valve itself?  If it hums, is that good
> enough?
>
> What are the other inputs into the idle stablilzer circuit?
>
> I get this high idle when warm and cold on an intermittent basis.  Some
times,
> pressing the throttle and releasing fixes it, other times not.  The high
idle
> appears when it's hot outside, or cold(er) outside, but not always.  I'm a
bit
> stymied and since we are headed on a two week road trip, I'd like to have
a
> handle on this.
>
> Please reply via p-mail as I'm in nomail at the moment.  TIA!
> --
> Keith Adams
> Calgary, AB, CA || http://www.clubveedub.com
> 86 Westy "Roxy" || 64 Beetle