hi robert,
same problem here, replaced idle stab and no change.  i just manually
adjusted the idle lower.  the prob with that however is the potential of the
van stalling on first start up when idling until it is warm thru.  so don't
know exactly the cause i more or less just deal.  incidentally i keep my
idle at about 900+-.  1500 is way high, that's when i started to tinker.  if
you get some better advice i'd like to know as i have been dealing with this
for a couple of years, and i replace icu, stabilizewr, o2 sensor and fiddled
with grounds as well, nothing worked.
just some thoughts
jason

>From: robertmstewart <robertmstewart@MAC.COM>
>Reply-To: robertmstewart <robertmstewart@MAC.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Idle issues - cold is fine, warm is high
>Date: Fri, 12 May 2006 13:53:05 -0400
>
>So I have been taking the van on some long and short drives lately and have
>been noticing a strange thing with idle and need your collective wisdom.
>
>To preface this the O2 sensor was replaced, the van has had a complete
>tune-up as well with standard new tune-up parts.
>
>THE ISSUE:
>I have noticed that if I start the van from a cold start that sometimes it
>take a couple cranks with the starter to to get it started. (Normal?)
>Battery is new, just 3 months old.
>
>Once it does start it idles at around 1,000 on the gauge. (Normal?), when
>driving and and at a stop light it hangs at 1,000-1,100 when cold.
>
>If the van is running for a while the idle increases to 1,100-1,400 on the
>gauge. (Normal?) It feels like it�s revving way to high..
>
>When engine is really hot from a long 3hour trip I saw it go up to 1,500 on
>the gauge when I was stopped at a stoplight! I new something was wrong
>then.
>
>Do I need to adjust the idle itself to be lower?
>Or What needs replacement?
>Idle stabilizer?
>
>So what do I need to do?
>
>Thanks in advance for your suggestions..
>
>
>--
>Rob
>NYC/Long Beach, NY
>88 Wolfsburg, Silver, 212,000 Miles