Occasional quick engine hesitation. no codes.only visible clue is temp gauge bottoms out quickly then returns.I replaced fuel filter. had sea foam put in gas tank a few times to possibly remove water. problem still accuring.only other unusual thing is my engine has stalled on me a few time as I was at a stop or quickly came to a stop. I'm thinking it's probably related to the hesitation problem.brought vehicule to dealership. they pluged it in,did certain tests and found no codes and no answers as to my hesitation problem.