Cylinder 6 misfire

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Joined
Nov 5, 2006
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Norman, OK
So the 04 ST started to go down on power and the CEL pops up, showing a cylinder 6 misfire. Change the plugs and wires (motorcraft) only to have the same problem so I decided to change the coil pack (motorcraft also) and I still getting a cylinder 6 misfire. No other codes at the moment, 128K miles, any suggestions?

THna
 
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