rotors? are you talking about brakes? your rotor might be good, dont mess with it until you know for sure thats the problem because to get a new one in you have to figure out where top dead center is and its just a pain but when i did my regal i just needed spark plugs and wires and for the most part that was it to get the engine going. also dont be a downy like me, make sure you clean out the tank if it is dry.
That is what came to mind when I seen rotor in his answer but not sure what it is under the hood