SkiSmuggs

I would be one of those. Struggled to pull my fiver up a mountain at 41K. Changed to the 2013 plugs gapped at .030 and all was good. The dealer said that 2 of the 6 were done.

maplelakeduckslayer

Yeah mine were misgaped and I had the miss going up hill after 3 months of ownership...then it spread to while accelerating slowly while staying in 6th gear using boost...then to any time I accelerated, any gear, it would miss. That was by 36k miles. I changed them out at 36k and all those problems went away.

Kenferg1

What kills me is that miss gapped plugs are unnecessary. The technology exists to automate the process so that all plugs are gapped consistently. I mean, the EB has been in production for the F150 for three years now. Since there are almost half a million EBs on the road, that's more than 3 million plugs. I can't understand why someone at Ford isn't demanding some heads for such a basic element of the engine. It costs them big money in repairs and good will over such a simple issue as the gap of a spark plug. And as engines get more and more sophisticated the necessity for proper tolerances on things like plug will be very important.