The idle speed is controlled by a separate controller, not the ECU. The
controller is located in front of the right side tail light. Both can fail
and the controller can respond to a bad input.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Alasdair Crawford
Sent: Monday, July 30, 2007 9:49 PM
To: vanagon@GERRY.VANAGON.COM
Subject: 87 Westy High Idle

Last weekend my 87 Vanagon suddenly developed a 3600rpm idle!  Found that
if I disconneced the lead to the Idle controlvalve it imemdiately dropped
back to normal 850rpm.  Would this suggest a valve problem or does that
mean something else feeding the ECU is telling it to request 3600rpm?

Trying to decide whether I should replace the valve (a $150 experiment) or
just take it to the shop for real trouble shooting.

Thanks,
Alasdair Crawford
87 Westy