SSoofast

If you decrease values in MAF calibration table does this lean it out?

Holden LS1 Tonner

yes
e.g mine at 1500 hz is 2.14 g/sec , if i lower the number to 2.12 g/sec it will read that it is getting less air at 1500 hz and inject less fuel .

SSpdDmon

iTrader: (10)

Yes. MAFS = Mass Air Flow Sensor. If a smaller amount of air is being reported entering the motor, a smaller amount of fuel is calculated. The VE table needs to be close to what the MAF reports as sometimes it is a combination of the VE and MAF that is used for fuel calculations.