1998 Mercury Villager Q&A

1998 Mercury Villager Question: Have code po306 cylinder 6 misfire detected. What should I look for bad plug

Seems to be running on 5 cylinder when under lug but runs fine some of the other times. Starts and idles fine. -
Answer 1
Have compression checked if ok a GOOD tune up may be in order. -
Answer 2
yes i changed knock sensor lower intake gasket upper intake gasket added antifreeze also changed injector rings still runs rough and doesn/t stay on steady shuts off -