I was going to ask the same question.  I have a digifant 1.8 liter inline
jetta also in my 84, but all the other stuff in there looks like regular
WBX..
  I know the digifant is relativly simple and inexpensive yet so far mine
works very well indeed..So far being about 40k miles under me, who knows
what the PO drove.  One idle control valve failure, one temp II sensor and
one replaced O2 sensor..bout it.  New plugs once a year or about 20k
miles..New fuel filter once a year..
  Don Hanson

On Sat, Oct 31, 2009 at 11:03 AM, Mark Dearing <VWBrain@aol.com> wrote:

> In a message dated 10/31/2009 11:09:48 A.M. Eastern Daylight Time,
> crescentbeachguitar@GMAIL.COM writes:
>
> Digifant.   1.9 is DigiJet
>
>
>
> hey guys other than the ingnition control system what is the difference
> between the two??   I have a 85 vannie running a 1.8L jetta motor with  the
> vannie controls system , only differnce I see is the jetta has a knock
>  sensor
> that I just didn't use.  later  mark  d
>