Have you checked out your o2 Sensor to see if it is fully operational.  It
will change your fuel mixture if it is not working properly.

Gaelen
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At 01:27 PM 8/12/98 EDT, The Buslady wrote:
>>Subject: Vanagon fuel problem
>From: "Brent Hyre" <bhyre@msys.net>
>Date: Wed, Aug 5, 1998 2:29 PM
>Message-id: <6qa8kd$b05@enews2.newsguy.com>
>
>I have a 1986 Vanagon Syncro water cooled with 110 k miles.  Last week it
>started running real rich.  One moment it did not, and now it does.  The
>mileage went from 22 mpg to 12 mpg.  It has enough fuel coming out of the
>exhaust it appears to be a diesel.  Is this a common easy to do problem?
>Thanks,
>Brent Hyre
>bhyre@msys.net<
>