It the idle control valve prone to problems during cold weather?  I
replaced mine with a new one last fall..and today it again started doing the
"1500 rpm.....down to normal idle....1500rpm.....down to normal idle...
cycle.  Zero degree weather overnight and not going above about 10f all
day.  Van would not start without a bit of throttle either, first thing this
morning...The cycling of the idle speed was this evening..and lasted for
about 10 miles until the van was really up to warm temps.  Exact symptoms I
had from a failed Idle Control Valve...One shouldn't fail in under one year,
right?  Hope not they are not cheap .
  Do these things ice up or get sluggish in extreme cold?
  Don Hanson