Fuel Cut off on lower RPM then before!!! What does it mean??

[JockoT]

This is from GM.

DFCO is enabled when the driver’s foot is off the accelerator pedal and the vehicle is coasting. Through integration of engine and transmission controls, the engine speed is carefully controlled under these deceleration conditions. Fuel automatically begins flowing back to the engine when the driver accelerates or when the engine speed approaches idle conditions.

[teoman]

I know how it works,

I just confused myself. The lower it works the better in theory it should work from the redline to idle. So working at 2000, 1800 and 1200 rpm were good things in my opinion. Later did i realize that it was not working from redline to stated rpm.