They diagnose problem D50 Other Troubles-Specific To Engine Function, was told the No#8 Cylinder was loosing communication with their computer 53 times during test drive. Dealer contacted me stating "Unable to verify concern at this time tech 173". I asked them to keep one additional day to problem solve only ending with the came outcome.
Vehicle was picked up and taken to Huntington Ford (Rochester) which they diagnosed that No#8 Cylinder Bank2 0/2 Non Responsive. Replaced #8 Coil, both plugs for #8 cyl. and wire for coil assy.
WOW! Runs like new, Thank you Huntington Ford for fixing the problem.