91 SR20DET O2 sensors

[EvLSpectre]

Well.....the title says it. I know these cars are supposed to be single O2 because OBD2 was not a thing till like 95. Car was a DE and then turbo swapped, and has its normal O2 sensor just after the turbo on the down pipe. There is a second sensor plugged into the cat though. Car was imported in, and said it was ROM tuned, which I believe cause it has SARD 550cc injectors and the Z32 MAF, so would the tuner add on that extra sensor?

[jedi03]

usually second 02 sensor is just for air fuel monitoring...so in essence to help with tuning

[brndck]

trace the wiring. usually people will mount the o2 sensor for a wideband gauge on the "cat" or "test pipe"

[EvLSpectre]

Sorry, I been busy with work. But I just swapped over the pipe for the ISR test pipe. It also turns out that the cat...if you can even call it that on was punched out. Shes been normal-ish but after the Pittsburgh car meet, on the way back she was complaining bad. Breakup and sputtering. Cannot find any ROM tuners for me around here though, until I get the S-AFC.