Most likely you have a bad isle speed control unit. I have also see a bad
valve cuase this behavior. Make sure the input for the power steering or the
AC is not being triggered and a bad connection for the temp 2 sensor can
also tell the ECU and idle control (shared input) that the engine is very
cold causing a fast idle. Since you have two vans try swapping the
controllers to confirm.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
JRodgers
Sent: Friday, January 3, 2014 8:28 AM
To: vanagon@GERRY.VANAGON.COM
Subject: 88 GL - Idle Stabilizer System - Was Distributor Woes

After a lot of monkeying around, I finally got Ol' Red to run properly - but
not exactly by the book. If I leave the idle stabilizer valve (which hums as
it should) disconnected, the engine starts and after a warmup - idles
delightfully around 800/900 rpm.

When I do a cold start with the ISV connected - the engine over speeds.
Not good right from a cold start. Should come  up to 1200-1500 and then drop
back as it warms. But it goes well above that. I won't operate under those
conditions so just keep it disconnected.

Anyone with any ideas as to how to adjust this out to get it to function
properly with no runaway speed on start up?

Thanks,

John