Coil, module, injectors double check firing order on wires
Propably needs a tune up. Plugs & wires. This vehicle is 11 years old.
You have connected the wires to the wrong plugs.
Yes, absolutely!See "Related Questions" below for much more about changing Windstar plugs and wires
that is unusual, your spark plugs and spark plug wires need to be changed if its a gas engine.
try changing the spark plug wires also
did you change the wires also. if not you probablly have a loose wire for one of the plugs. does it run any different
I would replace the spark plugs after 50K, the wires and plugs again at 100K.
you either did not gap the plugs to spec or you put this wires on wrong
Do a compression test to determine condition of engine internals
could be distributor cap or rotor
you have 2of the plug wires on the wrong plugs or distributor cap
check spark plugs and wires