Idle problem, '89 200 TQ MC2

[Kneale Brownson]

At 11:23 PM 11/25/2002 -0500, Larry C Leung wrote:

>Hello List;
>
>My '89 200Q, MC2, chipped seems to be idling rather high, even when
>totally warm. It idles about 1200+ RPM even if I blip the throttle.
>
>I checked the Bentley, but have not had the time to do the whole
>set of tests with the ammeter, and come to think of it, I'm not even
>sure if my ammeter can handle 2 A.
>
>Anyway,  I tried unplugging the ISV with a fully warm engine and the idle
>
>dropped to an appropriate 850 RPM.
>
>When I plugged the ISV back in, it remained at 850, even after blipping
>the throttle.

Doesn't the key have to be turned off and back on to reactivate the
ISV?   Did you try to clean out the ISV with an appropriate solvent?  I
think carb cleaner?