Audi Repair: Multiple cylinder misfire 2.8 30V, valve cover gasket, purge valve

Question
I have check engine light on and sometimes blinking. Received 3 codes Random/multiple misfires detected and cylinders 1 and 5 misfires detected. I replaced plugs and coil pack still same problem. Noted that all 6 spark plug
wells had oil in them. Is my misfire caused from the oil in the wells. Plan to replace wire set and valve cover gasket. Seems there must be pressure in valve cover so I plan to replace purge valve(pump). What else should I do. Is there something else that can cause this problem. Car misses under
light load. If I run in lower gears do not notice miss. Under light load it bucks like I am running 10 mph in 5th gear.  Any assistance will be appreciated.

Answer
hello
It's the good idea to replace your leaking v/c gaskets and plugs.
I will try to run fuel inj cleaner through the injectors, once or twice. We use the one which goes in the container and compress air is used to push it through injectors.
Or you can swap the injectors and see if the misfire moves with the injector.
good luck                 Greg