I picked up the following from another list member when I asked the same
question.  Change the air filter!

John Lauterbach
----- Original Message -----
From: Captain Ray <busray@YAHOO.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, September 06, 1999 9:57 PM
Subject: 1.9 WB fast idle

> 84 GL 1.9 w/ 4 spd 147k.
>
> The last two days I drove my bus, it has started
> and idled fine.  After I drive it awhile, it
> idles very fast.  Shutting the engine off and
> starting it fixes the problem.  Sensor?  ECU?
> Blackforest elves feeling like gremlins lately?
>
> Thanks in advance,
>
> ===
> Captain Ray
> IXOYE
> Yet unnamed 84 Vanagon GL (sunroof and wolfy weekender)
> Wild, Impoverished and Wonderful West Virginia
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