Chris,
Lots of things could cause this. I would check the idle position sensor
first. A quick check is to listen for a clicking noise as the throttle is
opened and closed. About %87 accurate.

Have you been experimenting with the AFM spring tension? I was and this same
problem resulted. It was too loose. You might try tightening it a few
notches.

What year bus is it? Does it happen cold and Hot?
Ken Lewis
http://neksiwel.20m.com/

----- Original Message -----
From: "Christopher Gronski" <gronski@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, January 23, 2007 9:06 PM
Subject: [VANAGON] Lags at low revs + BAD mileage

> Volks,
>
> My van is exhibiting weird behaviour. When I pull away from a stop and
> put my foot on the gas the van lags and the revs will not pick up.
> Moreover my milage has dropped to about 200km / 120 miles per tank
> full.
>
> ONce the revs pick up the van behaves normally. The only way I can
> leave a stoplight is to put it in the granny gear, take my foot off
> the clutch (without using the gas). Once the revs pick up I can use
> the gas then switch to first and then I'm fine.
>
> Any thoughts?
>
> Chris
>
>