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  1. Mustang EcoBoost Discussions
    2017 Ecoboost mustang with 47k miles No warranty Car continues misfiring horribly. I am getting oil on the electrode of the 3rd cylinder spark plug. when I change the plug it runs fine for a couple of minutes and then it starts to misfire again. I got the valve cover and gasket replaced. I...
  2. Mustang EcoBoost Discussions
    I am having a misfire on the cold start. I changed the plugs and couls and was ok for a couple days and now misfire again on start. Could this be a dirty air intake sensor? Or more serious
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