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  1. Focus ST General Discussion
    I’ve noticed - when I start my engine, my car idles low to high between 3rpm-1rpm. It goes back and forth for about 5-10 seconds before everything mellows and stays in the 1rpm range. Is this normal? I cut off my resonator/muffler and now I hear all those new noises I didn’t hear before when it...
  2. Focus ST Repair Shop / Service
    2014, less than 2k miles. On start up occasionally my RPMs drop and she shutters for a second, then RPM's return to normal idle. Any ideas? If it keeps up, I'm taking her in.
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