John,

Thanks for your reply.

I did swap out the idle relay (controller) and it acted exactly the same
way.

Anyone (who knows these relays) think it might be a bad connection, wiring
or a ground? I cleaned things up pretty well, but it's always possible to do
more.

Why would it act up when it gets warmed up, but be OK when cold? It gets the
signal from the temp sensor obviously.

Does anyone have a diagram of what's going on inside this relay?

Kim

----- Original Message -----
From: "John Bange" <jbange@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, August 16, 2008 5:07 PM
Subject: Re: Idle Relay - Idle Valve match?

> > This begs the question, as there were different series' of relays and
valves
> > and ECUs: Are there certain sets that were designed to go together?
>
> For the 2.1 Digifant in NA, there's just the B revision and D revision
> idle control module, and the only difference is the D revision is less
> likely to crap out. ECUs for the NA market are likewise essentially
> work-alikes, and really don't come into play anyway, as the idle
> control system is completely independent of the ECU--- all it does is
> watch RPM and allow more or less bypass air via the valve. Surging
> idle with AC sounds like a bad idle controller, as it's the only thing
> that's watching the compressor. A bad valve would more likely give you
> a bad idle all the time.
>
>
> --
> John Bange
> '90 Vanagon - "Lastwagen"
> '90 Vanagon GL - "Wiesel"
>