Hello all. 2005 Legacy GT, 50k miles, no mods. I got a check engine light for cylinder misfires on 1, 3, and 4. I brought it to the dealer, and they said I had two bad ignition coil packs. I replaced all four coils, all four spark plugs (see pic), and got a new battery. The next day, I got a CEL for cylinder misfires on 1, 3, and 4. Any idea what else it could be?
Regarding the plugs - three are almost identical looking, and I don't remember where each was from. The black plug was from the driver's front cylinder (#1?).