Since many performance camshafts add valve-event duration and some degree ... adjust the triggers that make us step from all cylinders to shut-off mode and back again. Looking at popular ...

the valves for the effected cylinders must also be closed, and the fuel must be shut off as well. Also, for reasons we'll go over later, the throttle position must be changed in the background for ...

General Motors's Active Fuel Management (AFM) technology utilizes hydraulic valves, solenoids, and advanced software to shut ... by switching off the fuel delivery to half of the cylinders under ...