This is a short PE scan I made of my 98 Trans Am (stock LS1 engine). Notice the mV differece between the banks. The light blue line is the AFR measured with a WB installed just before the passanger side catalyst.
In CL both banks have +/- 0.5% the same fuel trims so now I'm surprised to see that in PE the sensors show different values.
Should I care about that? I know the stock sensors are fine just for CL operation, but I was thinking they would show more or less the same values in PE.
Notice also the smaller difference at lower RPM (around 3000 rpm). Is it possible that a mechanical reason causes the difference? Like a damaged lifter or pushrod? A weak spring? Something that isn't working fine only at high RPM?
