NOOB here, ive been having this issue the last several days where i will get the MAF close in the afternoon then the next morning the truck will lean way out any help appreciated. I was tuning in open loop with WB but after the 2nd morning of getting lean I turned the STFT back on to help. My computer was dead this morning so i didnt get the log, after warm up and 5-6mi of 65mph down the highway it slowly worked from Lambda 0.98-1.05 up to 1.18-1.2+
The files named lambda are yesterday morning without STFT the other files are my last run last/tune last night
05 2500HD 6.0 shorty headers and cold air pipe to stock airbox and electric fans