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  1. Focus RS TroubleShooting
    UPDATE AT BOTTOM: Hi all. I recently had some misfires start occurring more and more over the past few weeks and ended up leaving my car at the dealer for 2 weeks for them to try and figure it out (no CEL). The car would basically breakup at the top end of the RPM range or it would "hiccup" with...
    backfire misfire stutter
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