Audi's idle all over the place

[SJ]

One reason may be a sticking throttle plate. Cleaning did the trick.
The symptoms and solution are referenced below:

http://www.audifans.com/pipermail/quattro/2003-October/082560.html
http://www.audifans.com/pipermail/quattro/2003-October/082715.html

SJ
85 Dodge PU, D-250, 318, auto
85 Audi 4k - - sold but still on the road
88 Audi 5kq
90 Audi 100q


> From: "Gerald Penyweit" <jeri408 at hotmail.com>

> This is what my cousin wrote to me. He is keeping my Audi for a few
months.
>
> >"I started driving the audi a few
> >days ago, and its driving well. I think it may need
> >an idle sensor because it will not idle down around 900
> >RPM. Its at about 1800 RPM at idle. Every now and then
> >it will idle down to about 1000 RPM for a few seconds
> >then it will jump back up to 1800 RPM."
>
> The car has not been driven since Aug 04, 2002. Can anyone
> relate to what this problem could be?
>
> Thanks,
>
>
> Gerald