so I was wondering when making a cal, whats the point of having the injectors spitting out fuel while the car is decelerating? Why not sure them off or have them shoot out minimum fuel? Other then keeping the cat hot I can't think of a single reason to have the injectors firing while in decel mode (in a manual anyway) the motor is still turning all the accessories so power wouldn't be an issue. Just push the gas pedal and the injectors start firing again... Would some thing like this work? I would think it would increase mpg a good amount also.