Thanks Matt,
I have found two earths on this AFM, one for the Fuel Pump circuit E1, the other for the sensor E2. And also since found a wiring diagram that seems to indicate (its in Japanese) that there is a third earth in the loom plug.
But, I earthed it tonight just to see what it did and got no change, so its was false hope for me.
Two is right for older AFM's and that is what I have, thanks for the info mate.
Cheers,
Mitch.