Ok, this is how it goes (any maf or SD). To tune the idle set the proper airflow per rev (0.25 -0.27), make sure fuel trims are in check +- 3%, next is a cruise tune (all condition drive highway too) ,in that log you have not exceeded 60km/h. Before cruise tune is done it's good to extend close loop operation ,you do that in (open loop thresholds tab )Finally wot tune , before tuning wot, set the (target- desired afr) in open loop max & min oct tables (current 9.5 afr , if you running 94 you can change it to 10.5-10.8 afr )than you make a pull ,analyze the log & look at wb factor at each hz point & make appropriate changes in the maf comp tab . http://www.ecmtuning.com/wiki/v3mafadjcombft read this, especially advance usage portion . Btw sd is as easy to tune as maf .