[t vago]

Originally Posted by serialk11r

t vago, you're forgetting that in order to produce the same amount of power, the manifold pressure needs to be higher.

Originally Posted by t vago

Since DCD only cuts out a cylinder once per firing cycle, intake manifold vacuum never gets a chance to significantly lower, which would otherwise lessen the amount of pumping work needed by the 4-banger. At best, there is no noticeable gain in fuel economy. In real-world conditions, the OBD-II engine computer would notice the misfires being induced by DCD, and would throw the engine into a less-efficient limp-in mode.