Seems like I have the exact same symptoms ("strange stalling problems
often intermittent")...:-(
The difference is that my van is an 1990 model which IIRC has a different
idle stabilizer module, but thanks for the additional direction to check.
Problem is that a new unit isn't available here. I still don't get why
Bosch had to add another external circuit for this function instead of
integrating it within the ECU. More complexity results in more failure
possibilities...

On Sat, 16 Dec 2006 19:52:52 -0500, John Middelkoop
<J.L.Koop@WORLDNET.ATT.NET> wrote:

>After about a year of tracing down contact corrosion, hall senders, O2
sensors, AFM, fuel pressure etc. , my problem is fixed. 83-85 vanagons
have an idle-stabilizer. They cause strange stalling problems often
intermittent.
>T.L.C Autowerks near Albany NY found it; something a number of Volks
Dealers as well as myself could not. I highly recommend them. - 85
Westy "Folly"