Find someone you can borrow an idle control unit from, or take it to a
mechanic that has one.  These are all failing after 30 years in a wet
environment, and can cause this sort of problem, among others.
http://www.gowesty.com/product-details.php?v=&id=23468

Stuart, BTDT

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Jvk
Sent: Saturday, August 26, 2017 9:57 AM
To: vanagon@GERRY.VANAGON.COM
Subject: High idle at stops

Morning all,

I've recently developed an idling issue after replacing the coil in our 86
2.1L.

At a cold start, the van will idle at around 1000 rpm. After a few minutes,
the idle will build to 2500 rpm. The van runs well on the road, but whenever
I pull up to a stop light the rpm's bump up to 2500. I can tap the gas and
get it to drop to 1000 for a sec, but then it's right back up there at
2500...

The AFM is fairly new and I pulled the rubber boot from it to the intake and
there seems to be no cracks/air leaks.
Any thoughts on what to look for next?

Thanks,
Jvk

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