The Parts Guy
The engine will run with a bad cam position signal, it just may fire the injectors 180-degrees out of sync (it’ll run like crap when this occurs, but it will run). The engine will not start up without a good crankshaft position signal.Cam sensor input is required to run. Without it the ECM doesn't know when to fire. I don't know if that is the issue but whenever otherwise healthy appearing engines don't start, I always suspect the cam and crank sensors. They can be tested...