At 18:12 1/6/00 , Richard C Welsh wrote:
>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?

This switch signals closed-throttle and wide-open-throttle to the ECU.  It
must be actuated at both those positions.  If it fails to close at idle,
the symptom will be that the engine will die whenever the rpm gets above
maybe 1500, then restart as the revs drop down around 1000.  If that's what
you're calling a loping idle, then you have found the cause.  Adjustment is
covered in Bentley (mine unavailable right now) but I'm sure someone will
fill you in.  It's critical and ticklish and (I'm told) a pain.  I have the
earlier '84 setup which uses two switches and is much easier to adjust.

david
David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"