Hi guys long time member new account.

120k miles. 6 speed


Can’t seem to get rid off my cel, replaced mass airflow replaced b1s1 all OEM Bosch

on cold start the car will start normal but then misfire after warming up for 1-2min, I get misffire codes only on one bank 1-3 Cylinders


Thinking both banks sensor 2s post are done I have x pipe cat delete with 90degree spacers




can someone let me know if these values from 02 sensors reading are way off on both banks

 

What are the codes you're getting?

 

Read the Bank 1 and Bank 2 camshaft deviation numbers. My car had exactly this same behavior when the camshaft position sensor failed. When the car is first started it runs in open loop so ignores those sensors which is why it runs fine for 1-2 minutes. Then it switches to closed loop and when it doesn't get the data from that sensor it throws the code and starts stumbling. I bet if you pull those values, the bank 1 sensor that's throwing the code shows all zeros.
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Originally I replaced a MASS AIR FLOW for flat spots upon acceleration 4-5K rpms and that resolved it, then I had o2 sensor bank 1 sensor 1 code for system to rich that resolved it now Im still getting the CEL

P2196
P2198


then missfire codes only bank 1 cyl 1-3

P0300 Mult Misfire
P0301 Cyl 1
P0302 Cyl 2
P0303 Cyl 3

 

What's the age of your coil packs? Have you replaced them? I have 122k on my 2006 C2s and i started to get hot misfires. This was at about 105k maybe. I replaced all plugs and coil packs and it hasen't misfired since.