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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
  2. Focus RS TroubleShooting
    Had a rough evening with the RS yesterday. Curious what your thoughts are on cause. It'll be towed to the dealer today and I'll update with the ultimate findings. 2017 RS2 - stock - untuned - 7,500 miles - headgasket recall service performed March 2018 Made it halfway home on my 12 mile...
    cel misfire p0300 p0302 stutter
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