Car won't start battery good no sound sometimes it starts sometimes it does not?

sounds like the fuel pressure regulator, which is made into the fuel pump in the tank of most new cars and truck, or you could have dirt in the fuel line, first change the fuel filter, and see if this helps.

Need to know if the starter works and cranks the engine but the engine doesn't start at times or if the starter doesn't crank the engine at times. It is not clear.