The injectors only pulse every other revolution however.

 

In my thinking I guess it never dawned on me (while obvious in retrospect) that the crank position sensor doesn’t know if a given piston is at the top of the exhaust stroke or compression stroke, just the angle of the crank. As others have mentioned the cam sensor would know that information and the two paired together would give the computer the information it would need to deduce where each cylinder was in it’s operation.

 

Thanks Alex, I hadn’t thought about the injectors.