Shudder and hesitation

My windstar was acctually doing something of the same sort recently during acceleration and even at a steady speed the car would stumble and kind of jerk I began to notice that the rpms would drop at the same time after a while it started to die on me while stopping I had it diagnosed, come to find out the cam shaft sensor that plugs into the alternator was lose which I had the alternator replaced just a few weeks prior the car drives great now. Maybe this will help if not sorry