I just did a plug change on friday. Now i have a miss fire on cylinder #3

 

Bad cop. Swap with another and see if miss fire moves.

 

good call

 

What plugs did you use? A lot of people have problems with brands other than Ford. But I haven't had any problems with my champions after 40,000 km... So it is hit and miss. But I would try swapping the coil to see if that's the problem first. Its common that they break after moving them so no big deal

 

I used Motorcraft Plugs

 

Ya so apparently you have to tighten up the spark plug after you replace it.....lol problem solved

 

yeah...that helps...