In a message dated 13/04/2007 4:12:27 P.M. Eastern Standard Time,
LISTSERV@GERRY.VANAGON.COM writes:

As i'm  stuck in the /%&$%?/!$?&% snow, i could not make it to Everybus,  so
i'm working...

Rarely that i ask for help but maybe now someone  had that problem and can
give me an hint, i'm NO AC guru at all.

The  van is an 87 with AC

Problem: customer drive the van with AC ON on  freeway, get out of freeway,
let go of the gas pedal, Idle stays at 2000  RPM, close AC, idle is fine, put
back AC, engine rev up to 2000.

So,  on Digfan/late Van, i can not trace what control the higher idle when AC
is  ON, i know that the ISCU (Idle Stabbilizer Control Unit) control the
Power  stering higher idle but not sure about AC, anyway, i thought i ask
before i  get into that problem and loose precious time. I didn't take a real
look at  the schema but will later.

Benny  Boy, I see no one has responded to your question yet.  I have worked
with  this problem before.  On top of the compressor is a wire, yellow/black I
think, not sure, but anyways that wire goes to the ICU and it gives info that
 the compressor is activated and the ICU is supposed to adjust the idle
accordingly.  I would check to make sure that wire is connected and  working.  If
that's not the problem then it's the ICU that's at  fault.

Cheers,

Frank  Condelli
Almonte, Ontario, Canada
'87 Westy, '90 Carat, '87 Wolfsburg  (Forsale) & Lionel Trains (_Collection
for sale_ (http://members.aol.com/Fkc43/trainsal.htm) )
_Frank Condelli &  Associates_ (http://members.aol.com/Fkc43/busindex.html)
- Vanagon/Vanagon Westfalia Service in the Ottawa Valley
_Vanagon Stainless Steel Exhaust  Systems_
(http://members.aol.com/Fkc43/stebro.htm)
_BusFusion_ (http://members.aol.com/BusFusion/bfhome.htm)  a VW Camper
camping event, Almonte, ON, June 07 ~ 10,  2007