Focus Fanatics - View Single Post - bad injector maybe?
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Old 04-07-2013, 06:12 PM   #4
PSUrivie
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Join Date: Jul 2009
Fan#: 67329
Location: Elkridge, MD
What I Drive: Boostin in the Mid-A

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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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