Bernie, this is a common problem with the 1.9l Vanagons.  Many times it
is due to a vacuum leak of some kind.  Here is a test.  You will see a
small green or black box on the engine bay firewall to the left near the
coil.  It will have two round shaped plugs hooked into it.  With the van
off unplug these two plugs from the idle control unit and plug them into
each other.  Now start and run the van.  If the idle is still
fluctuating then you definitely have a vacuum leak or a vacuum related
problem.  If the idle is stable then you either have a bad Idle Control
Unit (that little box that you unhooked the plugs from) or maybe a
poorly adjusted throttle switch.  I have the new ICUs in stock if you
find you need one.  Let me know if I can help you further.

Ken Wilford
John 3:16
www.vanagain.com

Bernie wrote:
> Thanks to all who responded last week in regards to my vanagonproblems in
> Port Townsend.
> The ignition switch was the most pressing problem and the O2 sensor
> the secondary problem and both have been replaced.
> The list was dead on in nailing the problems for me.
> If you folks didn't exist I may have to sell my bus!
> I am left with only one problem and that is at a stop light vehicle's idle
> will move up from 900 to 1200. When I press on gas pedal it drops down
> to 900 again but not for long.
> I'm planning a trip soon and is this something that won't really be
> an issue or is it something that should be attended to before I go?
> Any thoughts appreciated.
> Thanks,
>
> Bernie
> Vancouver
>
>