IW STi Forum banner

Ugh P0304 Misfire Cylinder 4?

2.1K views 6 replies 3 participants last post by  mooshoo  
#1 ·
2013 STI 11,000 miles, Stage 2 protune.
Was at the track for the first time today.
In first event, my CEL and traction control light came on but did not appear to be in limp mode as nothing changed with the car. Pulled into the pit and cleared it.
In fourth event, my CEL and traction control light came on again and definitely was not in limp mode. Again cleared it and decided to call it a day after the event was over.
My DAM was still at 1.00. On logs and on pulls, my car was fine afterwards as well as the 2 hour commute home without any knock.
My instructor said he noticed it occurred each time I hit a gator at a top of the hill and might have been the bounce that overloaded the traction control and maybe triggered a fuel cut that then caused the misfire?
Has anyone experienced such a thing?
 
#2 ·
No smoke out tailpipes or oil fill cap on start. Zero knocks in 2 days. Literally zero. Not even the old phantom knock that used to occur or shift knock (due to my improvement as a driver sadly). Oil Pressure is stable and at norms roughly. No oil consumption detected. The best the car has run - period. Oh well, going to enjoy it.