Stuart MacMillan wrote:
>
> Both the Digijet and Digifant are K-Jetronic systems, there is little
> difference between them.  The Digifant is a bit cleaner due to tougher
> pollution laws after '85.  The Haynes Fuel Injection book (a lot cheaper
> than anything from Bentley) has a good overview of the operating
> principles and components in the K-Jetronic.
> --
> Stuart MacMillan
> Seattle
>
> '84 Vanagon Westfalia
> '65 MGB (Driven since 1969)
> '74 MGB GT (Restoring)
>
> Assisting on Restoration:
> '72 MGB GT (Daughter's)
> '64 MGB (Son's)
>
> Parts cars:
> '68 & '73 MGB, '67 MGB GT

Hi Stuart,

The Digifant & Digijet systems are actually based on the Bosch
L-Jetronic design with "L" meaning Luft or air measurement via the AFM.
The L-Jet systems always control fuel volume by changing the ms injector
on-off opening time.

K-Jetronic is largely a mechanical system with "K" meaning Kontinuous.
That is to say that the injectors are forced open on startup by fuel
pressure and remain open continuously until shut down. Only the volume
is varied by the fuel distributor. K-Jet injectors are not electrical
and early K-jet systems didn't even have a control module.

To my knowledge all VW type 2 fuel injection has always been based on
the Bosch L-Jetronic system using an air flow meter to measure "Luft".

Regards,           John