Disconnect the O2 sensor and test drive. This is a good test for it.
If there is on change, reconnect and look at the temp feedback at
  the computer.
            Eric                   86-VW4x4
            vw4x4@fyi.net          72-240z
            Pittsburgh, PA USA     1936-Chrysler

On Wed, 4 Mar 1998, The Martins wrote:

> I checked ECU (Digjet) and all as per Bentley, replaced all small vaccuum
> lines (although not the plastic ones or large ones from the aux air reg)
> Everything checked out ok and I'm still rich.  I can not check the CO2 from
> home and haven't brought it in yet to do that.  With the idle screw full
> in, it still idles about 8-900 rpm.  Is this normal?
>  Any other thoughts ?
> Can you buy a CO2 meter for home use?
> Has anyone thought of a carb. for the waterboxer.(without bringing up the
> smog issue)
>
>
>
> Lj
> 85 Vanagon
> 72 SB
> X-72 Westy
>