I fold a shop towel or a blue paper towel to desired thickness, insert
between throttle stop and throttle cam, and voila, you got a cheap
RPM-holder-upper.  Then you're free to purge the air.

So, to recap:  Fold, insert, purge.

Works for me evertime, even on Valentine's day.

Chris S.
'85 Westy
www.knology.net/~vw/
http://groups.yahoo.com/group/wolfsburg_campers