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  1. Poor MPG with new plugs

    F150 Ecoboost Problems
    Hello all, I have a 2013 model f150 ecoboost that I have recently purchased a couple weeks back and had the dreaded miss that is ever so common. I ended up replacing my plugs and boots with Autolite XP5363 (gapped at .030) and Napa brand plug boots because I didn't want to spend the $$ on...