My vote goes to the throttle position microswitch for the idle position.  It's
on the throttle body.  As you open the throttle (at the engine, engine off), you
should hear a click at full throttle, then as you slowly (that's the key) let
the throttle back to idle position, you should hear another click.  With mine,
it wouldn't click at idle, unless you let the throttle snap back.

I de-gunked the thorttle body, and maxed the adjustment out on the switch, and
it works about 80% of the time now.  Just depressing the throttle a bit and
letting it SNAP back kicks the idle back down.

Keith Adams
Calgary, AB, CA
86 Westy "Roxy" / 87 Syncro project "Hugh"

Daniel Johnston wrote:

> I've got an 87 with manual trans and a/c. when cold, it idles up around
> 2,000 then moves down to about 1200. However, sometimes it remains at 2k
> and only with a blip of the gas pedal will it return to 1200. Any
> thoughts would be greatly appreciated.
>
> dan