I don't know on the 87, but on the 83 there is a throttle position
switch on the throttle body that tells the ECU when the van is at
idle.  Sometimes these switches go bad.  You can easily test for
continuity with a ohmeter. Alternately, just look at the switch and
make sure it is closed when the throttle is in the idle position and
open when you press the gas.  Also, make sure there is a click.  I
know that the throttle position switches are different on later
models.

-- Craig

On Tue, 1 Feb 2005 17:20:09 -0800, The Shaws <mindthegap01@comcast.net> wrote:
> Several months ago I posted a problem with my 87 syncro 2.1 wbx having a
> very high idle. Suggestions for repair we to replace or clean the idle
> control valve and or the electronic part of the ICV.
>
> I replaced the ICV with another and it was great for about 1 wk. Then the
> idle went up slowly. I cleaned out the old one and replaced the other. Idle
> went up even higher. Swapped it back and the idle is high again. Swapped out
> the electronic part, no change.
>
> So... vacuum leak? Is that what causes the computer to think it needs more
> gas? Any specific ones that I should look at?
>
> Any other suggestions?
>
> thanks
>
> peter
>