All done around 1500rpm
41° spark advance I feel like that's a little high.
2.2lbs/min.
Tps 15%.
Map is at 9.
Stft b1 is -4.7% ltft b1 is -3.9%.
Stft b2 is -3.1% ltft b2 is -4.7%.
Wanna see if everything is okay but the spark advance is high in my opinion I don't know how I would fix it and I don't know why my banks are under 0 would like a little explanation on what everything is if possible thanks.
If you have one, check the cam positioning sensor function. It controls ignition timing and must be properly set. 41 degrees at 1500 rpm sounds really high. Maximum advance , I think, is supposed to be around 32 degrees at 5000 rpm. Are you getting pinging (detonation)?
Correction - 32-36 degrees total advance.
Not getting any pinging
Forgot to add it's a 2003 gmc yukon 556xxx miles l59