I need some help, last week I got a CEL P0303 misfire, first thought check the spark plugs. I took it out and the tip was broken, it's inside the engine? I replaced all 4 plugs I tried to get the broken tip out with a magnet but no go Now the car makes this weird sound, youtube link below. I rented a borescope from autozone but I don't see anything inside, and did compression test all cylinders were about 150-160. Am I screwed or what do I do next?
https://youtube.com/shorts/1TgDpLs2MgA?feature=share
https://youtube.com/shorts/1TgDpLs2MgA?feature=share