[pal]

On the last session of a 2 day track event, the car goes into limp mode while I am WOT in 4th gear over 6200rpm. Shut it off after a couple corners and started it back up and brought it into the paddock and scanned for codes. Misfires on cylinders 3 & 6, injection shut down on both (images of the codes scanned using Bimmerlink attached here).

It was a hot couple of days and the ambient was 90°F in the last session today at around 3:50pm. Car had about 3/4ths of a tank of gas.

I changed the plugs and coil packs about a year ago on May 1st, 2022. The car had 21,160 miles at the time. Today it had 34,634 miles when the car misfired, and it was the 21st track day since I changed the plugs and coils. Only engine mods are a Dinan Stage 1 harness (the original big harness), Akra 300 cell catted downpipe, ER intercooler, ER charge pipes, K&N panel filter.

I did drive the car 95 miles home, and even did some 3rd and 4th gear pulls at partial throttle to maybe 5000-5500rpm. No issues. Car runs fine and even got as expected mileage on the way home.

Thoughts? And thanks in advance.