Misfire when going up hills or accelerating. I can see the RPM fluctuate about 3k-4k when it happens. There is no SES code so I don't know which cylinder is causing the issue. It happens sporadically. No difference in gas mileage either.

I've had one coil pack replaced many years ago. Might be taking it to repair shop if I can't determine which cylinder is misfiring.

 

You need a scan tool that can read live data so you can see the misfire counts per cylinder.