Issues I'm trying to solve with the N54. Suggestions would be appreciated

1) Bank 1 and Bank 2 STFT variance and trims are high

2) Boost error showing underboost. (no code)

3) AFR and requested seem like struggling to match. Not sure if this deviation is normal, just due to trims or what.

4)Fuel mixture codes and today fuel plaus code.


Wasn't logging LPFP or HPFP in these pulls but typically do. Usually look strong. Trying to find the sweet spot with trims vs timing corrections. This tank was was E40ish and the corrections, while not too bad, were across all cylinders. E50 clears the corrections but trims get worse. Fuel scalar set for E50.




Relevant service:

New injectors 20k ago, new hpfp 10k, NGK plugs every 10k, inline lpfp about 30k ago, valve cleaning last week. Coils original and 70k on the clock. Replacing vac lines this weekend.

FBO pro tuned. Current local DA about 4000 :crazy:


Injectors, solenoids, O2s, I don't know where to even start. All suggestions, advice, random thoughts, aphorisms, confucius quotes anything appreciated.




Couple of logs from tonight. Can grab others with suggested parameters as well.

Attached Files

• datalog2.csv (21.0 KB)
• datalog3.csv (24.6 KB)
• datalog4.csv (37.6 KB)