so i threw a 0301 CEL, which translates to a misfire on cylinder 1. i have approx. 53k miles on my car, and i'm thinking that it might be the spark plugs. the only strange thing is that i had my car protuned in may, and a few weeks later it threw this code. reflashed the same protuned map, and it went away. sure enough, it did it again, so i did the same thing hoping it would go away completely. oddly enough it did, until just a few days ago when it popped up again, several months after the last time. could this just be the spark plus needing to be changed, or is it a problem with the tune? i don't notice anything different at all, no knocking, loss of power, strange noises, etc. it just turned on one day as i was driving. TIA for any advice!