Spark advance 41°
All done around 1500rpm
41° spark advance I feel like that's a little high.
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.
Forgot to add it's a 2003 gmc yukon 556xxx miles l59