I have recently started tuning on my 2004 5.4L 3V F150 2WD SCREW. Truck is stock with no converters. I have heard there are nice gains to the 5.4 3V by tuning.

I am having trouble tuning the MAF Voltage.

I have log LTFT vs MAF and that works, I have also logged STFT vs MAF with LTFT Disabled (read on this Forum about doing it that way also)

I have done a Math Transfer Error % that compares The Equivalence Ratio Commanded Bank 1 vs WB Lambda Signal.

Scanning results show that even tho i have changed the Fuel Base to be 1.0 across the board that Equivalence Commanded does not stay at 1.0, it fluctuates while driving down to .86-.88, and stays around .98-.99 at idle.

How can i tune MAF Voltage based upon WideBand? Seems there is still something changing the fuel Ratio.

I have disabled CAT over Temp, Cat Flange Temp, O2 Temp Control, and DFCO while doing this. I have done this with both LTFT Enabled and Disabled.

Thanks ahead for any help.