Excellent...let me check mine again per Neils info stating that on
post-'88s the ISV hums only when the engine is running.  I know it isn't
working when the the key is on but the engine isn't running.  I haven't
pulled it and checked it with a 6V battery yet.  It is getting 5V when the
key is on, however.

Most likely it is no longer good, so I'd be interested in yours Jim

Patrick Spragge

From:   Jim Felder <jim.felder@GMAIL.COM>
To:     vanagon@GERRY.VANAGON.COM
Date:   10/01/2015 11:28 AM
Subject:        Re: Idle Stabilizer Valve part numbering question
Sent by:        Vanagon Mailing List <vanagon@gerry.vanagon.com>

I've got one, I'm pretty sure.

Jim

On Thu, Oct 1, 2015 at 1:05 PM Neil N <musomuso@gmail.com> wrote:

> In Bentley wiring diagrams for '86, to '90 and up,
> a change in wire gauge aside, I see the same
> wiring scheme from ICU to the ISV.
> On my '88 (which tends to use an '87 wiring diagram),
> the ISV "hums" with key to ign. on, engine off.
> IIRC, on later model years the ISV "hums" only when engine running.
> Possibly ONLY due to a change somewhere else in the wiring harness??
>
> IIRC, some 2.1 ISV's had 2 contacts, some had 3.
> AFAIK, the connector at harness only has (ore uses), 2.
>
> For point of reference, van-cafe.com shows 035.133.455F but out of
stock.
>
>
http://www.van-cafe.com/home/van/page_436_754/idle-control-valve-alternative.html

>
> Neil.
>
> On Thu, Oct 1, 2015 at 10:01 AM, Pat Spragge/RFAN <Pat.Spragge@rfan.com>
> wrote:
>
> > All,
> >
> > I'm looking for a known good, used Idle Stab Valve as mine isn't
working.
> > In my searching, I see both the spec'd 025 906 457A and a 037 906
> > 457C...does anyone know what the difference is btwn the 025 and the
037?
> > Are they interchangeable in an '89 Digifant system?  They 'look'
> > identical.
> >
> > Thx
> > Patrick Spragge
> > 1989 Westfalia w/2.1
> > Mountain View, CA
> >
>
>
>
> --
> Neil n
>
> Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca>
>
> 1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy>
>
> 1981 Westfalia "Jaco" Images, technical <
http://tubaneil.googlepages.com/>
>
> Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>
>