Idle problem, '89 200 TQ MC2

[Lino M. Valadas]

Similar problem on mine.

Here what I did:

Opened up the WOT switch very carefully with an exacto knife and still cut
the palm of my left hand :-(
Anyway,  re-soldered all solder points (4).  High idling problem gone.

HTH

Lino



----- Original Message -----
From: "Larry C Leung" <l.leung at juno.com>
To: <quattro at audifans.com>
Sent: Monday, November 25, 2002 11:23 PM
Subject: Re: Idle problem, '89 200 TQ MC2


>
> 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.
>
> As an aside, I recently replaced the engine grounds, which seemed to
> help the engine running significantly, but seems to coincide with the
> high idle.
>
> Is my ISV shot, or is there likely a different problem?
>
> TIA,
>
> LL - NY