2003 Dodge Durango Knocking and black plug

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Noises problem
2003 Dodge Durango V8 Four Wheel Drive Automatic 110k miles

My dodge starting missing a few months back I had it checked at AutoZone and it was a misfire in cylinder 1, I replaced the spark plugs and it ran fine for a few months, went to go on Thanksgiving vacation and it quickly overheated and wouldn't restart, needed tow, got home and had to move it from where the wrecked dropped it and it fired right up, drove it about a month, no misfire, no overheating, went to the store a few weeks back and developed a knock that gets worse with acceleration, pulled the plugs, plug in cylinder 1 is black though I'll be damned if I can tell from the photos on the net if it's oil, fuel or carbon. I think the plug smells like gas whereas the others do not, I could also be nuts. Any ideas?

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Saturday, January 16th, 2010 AT 5:24 PM

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