[Floordford]

So on a normal car before 08, or so, doesn't have any ignition or fuel canceling programing for cruising. Instead of giving a car a whole new custom ECM, which could cost $100-300, could 1 piston or 2 be shut off manually without too adverse of effects?

As I thought about it here are the negative things I came up with. I know it would make the engine run very choppy. Also that disabled piston in still compressing air which takes energy. If a car needs 20 horsepower to stay in motion at 60mph it will probably need 20hp @ 60mph no matter the pistons that get it there. It would mess with the vacuum and possible throw misfire codes.

But does anyone know of any aftermarket programing to let an older car do what these newer cars are doing?