2005 expedition takes several cranks before it will start. had starter and battery checked and both are good. changed fuel pump and driver module and still have same problem. what could the problem be?

 

Have you tried to turn the key to the RUN position for 10-15 seconds before cranking the engine. If not, I would try it. You could have a sensor that's not real speedy like it should be. Could even be a failing CRANK sensor.