About 2 months ago after getting an ape tune I began to have misfire issues and a general loss of Power. I was told that the increase of power can blow the spark plugs, so I obviously changed them after having the misfire issue( also if this helps, during the misfires engine light would flash). After pulling them out I had found a little bit of oil on the threads, my buddy imeaditly jumped to head gasket or piston rings. I didn’t think so because it was very light and the odds that I blew two head gasket and 6 rings is unlikely. I called my uncle and he said possibly a valve cover gasket, so I replaced it and found a TON of oil on the sides of the engine.(no idea if this related to the valve cover gasket but I’m going to include everything). I pulled the plugs while doing the gasket to find minimal amounts of oil on the new plugs threads and sprayed them with brake cleaner and put them back in. Whelp here I am still with the same problem but now since this has been going on over 2 months it’s gotten worse. My engine light is on and when I start the car it idles very roughly and the revs go up to 1600 and drop and rise a little eventually subsiding to 900 after a couple mins. I have experienced a dramatic loss of power and have tons of misfires if I go hard on the gas.

please help!!! I’ve already tried to get some help from Audizine but to no avail