2011 Ecoboost with 60k....just encounter the studder....
#11
Senior Member
Good deal that seemed to fix it. I also add dielectric grease to the boots and the connectors now. And being tuned I replace plugs every 15-20k miles(every 6 months), always notice a big improvement. Stock I wouldn't go more than 30k miles, but that's just me. The plugs that came in the truck brand new didn't last 3000 miles before it started misfiring