this month's project is to finally fix my  loping idle.  Some questions:

-is the idle stabilizer solenoid supposed to pull the valve ALL the way back?
my solenoid humms, and with the ignition on (engine off) it opens the valve
about 1/4 of its full range.  (roughly two millimeters of 6-8 mm possible
travel)

-has anyone ever "explored" their throttle valve switch (the thing under the
throttle housing).  i took the cover off mine last night and it looks like
there's a palstic cam with two lobes attached to the throttle shaft.  there's
also a tiny switch nearby, but not close enough to be actuated by the cam.
Hmm....is there a missing piece here?  is mine out of adjustment?  what does
this throttle valve swich do anyway?

-has anyone ever done all the Bentley recommended tests for the Digifant system?
can I use a standard Ohmeter and some common sense, or do you need a VW
muti-$-meter and a wolfsburg PhD?

Thanks for any knowledge you can spare.,

-Curt