The cam sensor is required if you want to drive each spark plug independently, such as a coil-on-plug (COP) system. The Ford EDIS setup fires as "waste spark" where pairs of cylinders spark at the same time. (1,6) , (8,5) , (4,7) , and (3,2) fire as pairs in waste spark, but one of the cylinders is firing on the exhaust stroke. Therefore, I do not run a cam sensor.
