Crank rotates 2 times for every 1 of the cam. Crank sensor tells top dead center of each cylinder bet cam sensor let's it no when it is an Exhaust or compression stroke. Engine can run without cam sensor because coil packs fire 2 cylinders at the same time, correct cylinders. I had a 91 3800 that threw the magnet off cam gear but still ran. Please note that the fuel injects may not be pulsing at the correct time, 50/50 chance, but the engine will still run less efficiently. I do not believe engine will run without crank sensor but I don't know for sure.
