Thanks Red Drifter.
I did some more inspection and reading of the manual over the weekend, and found that practically all Nissan cars have the same Air Flow Type dip switch settings, which must correlate to MAF.
http://www.apexi-usa.com/productdocumentat...cs_afc_gen1.pdf refer to page 6
Then on further inspection of my unit, I found that it's dip switches were all set as per the Nissan spec (Same for the Z32 and S14a) and the car type was set to the Z32 car... when most likely it came from an SR20 powered machine (I'm guessing here...) This leaves me with the conundrum as to what car type I should use...