I was driving my 2009 Toyota Corolla Ce on the highway today when my check engine light began flashing. So I got it towed back to my house for my grandpa to take a look at. He used a code reader to confirm a misfire in cylinder 1. Upon removing the spark plug we discovered the 'arm'/ piece guiding the spark somehow came off. We used a camera into the cylinder but could not see it on the screen how concerned should I be and can I plug new plugs in and just go again?