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    Spark plugs and ignition coil problem - 2004 EB 5.4L

    I have a 2004 EB 5.4L and had the spark plugs and ign. wire/coil boot set replaced at 183K miles. Now at 205K miles, I'm getting a service engine code for a misfire coil/spark plug. The guy didn't tell me the exact code. Should the plugs/coils be a problem this soon after replacement (22K miles)?
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