Haven't checked my plugs yet.....overall I'm pretty happy with the way my truck runs, other than an occasional rough-ish idle.
I'm curious to see if there is will be any negative effects seen from going to the small side of the of the recommended gap. Generally speaking an improvement in mileage and performance can be seen by running the widest gap the your ignition system can support.
2011 EB XLT SCREW Off Road Package 3.73 Gears (Traded in at 80K miles)
Got 19mpg on my road trip to michigan. 600+lbs of cargo and 3 40 minute stops that I had to idle the whole time. Average speed 70mph. There was a stretch of construction where I reset the meter and averaged 26mpg for 30 miles at 55mph. Drafting a semi helped. Couldn't really get on it due to precious cargo (baby).
Do you guys think that the plugs that come stock just have issues after you get more miles on them? Or did Ford change gaps between 2011-2012?
I think whomever supplies Ford with the plugs screwed up a bunch and, since they weren't getting ***** from Ford, they fixed the gap issue when they noticed it and kept quiet. But yeah, they could be crap plugs.
2011 XLT XTR 4X4 145" EcoBoost Screw Solo Performance Mach-X Eco-Dual Exhaust. Solo high flow down pipe