Wet spark plug on 2004 Ford F-150

When I went to change the plug in my 4.6 it was soaking wet with what appears to be motor oil. Where would this be coming from? I pulled it do to a "#6 cylinder misfire first 1000 rpm engine code."

by in Corpus Christi, TX on February 23, 2011
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3 answers 3 comments
ANSWER by , February 23, 2011
the valve cover seal for the tube is allowing oil into the plug hole contaminating the coil boot. i would replace the valve cover gasket, and the coil. Roy
ANSWER by , February 23, 2011
this would be a bad valve cover gasket.
COMMENT by , February 27, 2011
Thank you
ANSWER by , February 23, 2011
Question: is the oil you see on the outside of the plug or on the inside (electrode)?
COMMENT by , February 23, 2011
Mostly the outside, not sure if the electrode was wet, but it looked good.
COMMENT by , February 23, 2011
In this case, Roy would be correct. It probably is a leaking valve cover unless oil was spilled at one time. Any liquid seems to find the way to the bottom of the spark plug area.