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1.6 ecoboost
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  1. Technical
    Hi all, I have cmax 2011 1.6 ecoboost. The spark plug on cylinder 1 (far left of engine) becomes rusty over time. Its only this one and causes a misfire and rough running. Replacing it solves problem for about 5k miles but then have to replace it again. There is obviously water getting into the...
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