General Maintenance, Troubleshooting & Accidents.
So my son’s 2008 WRX randomly threw a P0301 code (independent, no other codes). I did basic work, plugs with proper gap, a #1 coil pack, and cleaned MaF. The plug condition (all 4) was poor and I thought I had this. The car seems to start normally and idle semi-Ok, seems like there is still a...