Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - bad injector maybe?
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Old 04-07-2013, 07:12 PM   #4
PSUrivie
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For this misfire you changed the coil pack, but did you change the plugs?? You said the plug was white. Can you take a pic of it? If your car is running lean maybe you have a leak somewhere which would explain the rough idle and fluctuating rpms.
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