My recollection was that, oddly enough, Digifant I came *after* Digifant II, and was used on California cars.  It had some minimal OBD-like fault code capabilities, a "check engine" lamp on the dash, among other things.

Is this correct?

Allan

On Thu, 30 Apr 2009 22:13 -0400, "David Beierl" <dbeierl@ATTGLOBAL.NET> wrote:
> At 07:53 PM 4/30/2009, Dave Arthur wrote:
> >Were there two implementations of Digifant on the 2.1 WBX? Which would apply
> >to the MV code engines?
>
> Only one, I reckon.  Digifant didn't become Digifant I until there
> was a Digifant II to compare against.
>
> >that). I have an S&S headers setup and of course no port before the cat. If
> >I measure CO and the tail pipe will that suffice or do I absolutely need to
> >measure upstream?
>
> Sounds as though S&S weren't thinking very clearly.  You'll need to
> get a test bung welded on...you absolutely have to measure upstream
> of the CAT because one of its main functions is converting 2CO + O2 -->
> 2CO2
>
>
>
>   --
> David Beierl - Providence RI USA --
> http://pws.prserv.net/synergy/Vanagon/
> '89 Po' White Star "Scamp"