My '82 Jetta exhibited similar symptoms, which stemmed from the air
throttle flap sticking due to a carbon buildup on its shafts.  I pulled the
air boot off, squirted aerosol carb cleaner on the shaft and bushings on
the inside (and a little outside for good measure.  Worked it back and
forth a bit, and then repeated several times.  The problem went away.

I hope your problem is as simple.

Cheers,
Doug

Lee Schelin <lschelin@IX.NETCOM.COM> wrote

>The only thing I did yesterday was to clean the Idle Speed Control Valve
>to see if I could get the idle under control. The little valve inside
>the unit moves freely. I sprayed the valve with electrical cleaner first
>and then sprayed it with WD 40 for lubrication.
>
>The idle is now worse than ever, idling about 2800rpm.
>
>Whether the two problems are related, I don't know.
>
>Any suggestions would be appreciated