Idle problem, '89 200 TQ MC2

[Ben Swann]

These connectors are fatigue points.  Over time it is likely one or more of
the wires will fail there, but you can't see it since it is covered with a
boot.  Glad you found it.

Ben

On Tuesday, November 26, 2002 7:28 PM, haydn taylor
[SMTP:haydn_taylor at hotmail.com] wrote:
> hey Ben
>
> I posted the same question recently and finally got round to
investigating
> this weekend, you were 100% correct - broken wire undeer the rubber  boot
on
> the throttle switch (which I had already replaced).
>
> I fixed the wire and the idel is now perfect
>
> thanks
>
> Haydn
> ----- Original Message -----
> From: "Ben Swann" <bswann at worldnet.att.net>
> To: <l.leung at juno.com>
> Cc: <quattro at audifans.com>
> Sent: Tuesday, November 26, 2002 2:42 PM
> Subject: Re: Idle problem, '89 200 TQ MC2
>
>
> > Search the archives for "high idle" as I posted recently a complete
> > synopsis on this.
> >
> > I doubt it is your ISV, as you confirmed it is working when you
> > disconnected it.  More likely the Idle switch circuit.  Could also be
> > hardened o-ring on the idle screw in the throttle body.  Could be many
> > other things.  Let us know what you find.
> >
> > Ben
> >
> > [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]