[gm5oh]

Hello,

I have a 2013 FR-S and I recently changed my spark plugs 100ish miles ago. Everything seemed to be fine, I drove the car hard, cruised, etc. and had no misfires. Yesterday, however, when my tuner asked me to data log (3rd gear, 2.5k - redline pull), I heard an odd misfire noise so I decided to monitor all 4 cylinder misfires. I was able to conclude that cylinder 3 is the only cylinder to misfire and only misfires under high load (i.e. WOT 3rd gear, 2.5k - redline).

I have yet to see a check engine light despite cylinder 3 misfiring for a whole 2.12 seconds in one data log and on many other occasions. I plan on taking a look at my plug and coil pack for cylinder 3 sometime this week.

In the meantime, has anybody experienced this issue before / know how to resolve it?

Any help is appreciated, thank you!