nukemocca

im already set my throttle lo 10% and hi 40%..

i dont understand to setting up the Air correction factor setting (Throttle opening, large / small) do i need afr meter to change the value?

the manual wrote that the correction factor is +10%, the ECU recognizes that
the air volume has increased 10%, so fuel is increased about +10%

i try increase the correction value to 15% at 4000-6000 rpm.. but still fill the same..my car still slow..
but i can hear the diffrent at sound of engine went i change the correction value at 1000rpm(stop car).. am i missing someting? or just my engine already rich the limit? coz all part in my engine still stock