I suspect by hall sensor you refer to one inside the distributor. There
is another sensor which senses for TDC. All the sensors on the Digifant
are important, just that some if defective the engine won't even turn
over.

A very good book on how the system work is "Bosch Fuelo Injextion &
Engine Management" by Charles O. Probst, SAE. It is a Bentley book.

If you unplug the AFM the engine will still idle. However you cannot
really drive without it connector unless you don't mind crawling along
at crab speed.

- Vince

http://gipsyflies.home.comcast.net
1989 Vanagon GL Camper
1993 Mazda Miata (for sale)
1996 Land Rover Discovery
2005 Mini Cooper S

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of tabe johnson
Sent: Wednesday, September 01, 2004 4:54 PM
To: vanagon@GERRY.VANAGON.COM
Subject: How does Digifant work?

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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