Rodrigues

I scanned my car with datamaster and my right banks lterms is 108 and my left banks lterms are up in the 140's and 150's. The right bank is just locked in, nothing will change it. No SES codes, I loaded the PCM4less tune. My sterms are near perfect... my left bank wants to go a little high and my right bank wants to go a little low. I extended the o2 sensors for my long tube headers with solder, the mV readings jump all over the place in closed loop. Should I try some real o2 extendors and some new o2 sensors? I am getting 36 PSI steady at idle and 38 PSI primed.

EviLBoX

I would suggest swapping your left/right O2 sensor to see if the problem switches sides first. That will tell you if it is the O2 sensor or not.