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Q:

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

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Seems to be running on 5 cylinder when under lug but runs fine some of the other times. Starts and idles fine.
(2) Answers
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