Neil, is your O2 sensor heated?
Are the heater wires hooked up proper and functioning?
If not, the O2 sensor won't provide accurate data to the ecu.
I don't think the O2 input is even used in fuel calculation until the motor
is quite warmed up.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
neil N
Sent: Saturday, April 19, 2008 1:33 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Gas mileage/o2 sensor 1st report

During a short "first start" on my Jetta Vanagon conversion, I could
totally smell how rich the exhaust was.

The O2 sensor was connected, but not "sniffing". (exhaust incomplete)

I'm sure a properly operating sensor makes a big difference.

Neil.

On Sat, Apr 19, 2008 at 9:44 AM, Mike Miller <mwmiller@cwnet.com> wrote:
> My all above average fellow van owners,
>
>
>
>  After replacing the Bosche O2 sensor with a Walker the first tank of gas
[84
>  miles with 18 of those miles without use of O2 sensor] gave a mileage
>  reading of 16.6. Usual for the type of driving done is around 13.5.
>
>  Taking a trip this weekend and will report further.
>
>  Mike
>
>  87 syncro
>

--
Neil Nicholson. 1981 Air Cooled Westfalia - "Jaco"

http://web.mac.com/tubaneil
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