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    Cyl 3 misfire

    I need some help. My 2012 5.7 had an engine light that showed cyl 3 misfire. Truck has almost 110 K miles and at 100k I changed the spark plugs. So I change the coil pack and everything is good for about a week. Truck still feels a lil weird but engine light is gone. Welp.... light comes back...
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