Oil in the Spark Plug Well of my Porsche Cayenne

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My Cayenne was experiencing severe loss of power and misfiring after about 15 minutes of driving. There was Misfire code for each cylinder and the Dealership believed it was a result of a bad ECM (engine computer module) which would cost $4000 to replace and program.

I figured I do my own work and I was actually relived to find oil in the spark plug wells and Im hoping this is the cause of my engine problems.

Now I need to remove the valve covers and replace the gaskets.