Both Digijet and Digifant are implementations of Bosch's L-Jetronic
system.  For more information on them, I found "Bosch Fuel Injection
Systems" (ISBN 1-55788-365-3, published by HPBooks) very helpful.

You wouldn't get a pulse if you unplugged the hall sender because the
ECU doesn't think that the engine's running.  You will with the AFM
unplugged because the ECU knows that it's running, but the amount of
the pulse will be GROSSLY inadequate for what the engine needs.  By
far, the AFM is the more important input for making the engine run
reliably and stably -- but you won't get anything without the hall
input.

-Kyle

On Wed, 1 Sep 2004 19:53:35 -0400, tabe johnson <xtabe@yahoo.com> wrote:
> Does anyone know how Digifant works?  I think
> that the hall sender input to the ECU is more
> "important" than the AFM input.  That is, if
> you unplug the hall sender when the engine is
> running, you'd get NO injection pulse.  But
> if you unplug the AFM, you'd get a small injection
> pulse anyway.
>
> Anyone agree/disagree?  Thoughts?
>
>
> --tabe johnson
> xtabe@yahoo.com
> Vancouver, BC
>
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