Originally Posted by
joecar
B3618
when you refer to its value, look in the upper RH corner of the EFILive tunetool, does it say Lambda or EQ Ratio...?
If the value is 0.82 Lambda then you're almost safe (for SC/TC Lambda 0.78 would be safer).
If the value is 0.82 EQR then you are way too lean (PCM prevents PE commanding less than EQR 1.000).