Hi Scotty
I have a 2002 Windstar. I had a real bad sputter Heading over 35 miles an hour. I replaced the spark plugs and wires as well as the upper intake gasket and it cleared the check engine light however still on occasion will have a little bit of a sputter around 50 mph. Could it be possible that there is another issue the check engine light is not catching or could be possible that engine has carbon buildup causing this?