[opihi5]

About a month ago I started receiving codes for my o2 sensors, but i did not bother replacing immediately because the car was running fine...even passed smog with the codes. I just started to get misfire codes through every cylinder yet the car feels fine once up to temp.

Codes are copied...
// 1) 2743 Lambda sensor heater resistance diagnostic VKAT bank 2
// 2) 2742 Lambda sensor heater resistance diagnostic VKAT bank 1
// 3) 2B42 Combustion misfire with emissions deterioration cyl 1
// 4) 2B43 Combustion misfire with emissions deterioration cyl 2
// 5) 2B44 Combustion misfire with emissions deterioration cyl 3
// 6) 2B45 Combustion misfire with emissions deterioration cyl 4
// 7) 2B46 Combustion misfire with emissions deterioration cyl 5
// 8) 2B47 Combustion misfire with emissions deterioration cyl 6
// 9) 2B48 Combustion misfire with emissions deterioration cyl 7
// 10) 2B49 Combustion misfire with emissions deterioration cyl 8
// 11) 2B4E Combustion misfire with emissions deterioration several cyl

Right now i'm running the AFD e85 kit with a fully catless exhaust and evolve tune.

I'm starting off replacing the precat o2 sensors that could be potentially be causing the issue. I also pulled out a spark plug and found that the threads have a very slight coat of fuel/oil but the tip looks in good condition and dry.

Any insight helps. Thanks