Idle problem, '89 200 TQ MC2

Ben Swann bswann at worldnet.att.net
Wed Nov 27 08:33:53 EST 2002


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]





More information about the quattro mailing list