GoFastTSI

iTrader: (1)

I am still chasing my rich running condition and have conflicting information regarding the O2 sensors. Some posts say one for the OBD1 cars others say 2 with one main heated and a secondary. I currently only have one O2 sensor in the factory downpipe bung (new stock Supra pre-cat Denso O2 sensor). Anyone know how many? I have an extra connector adjacent to the AC compressor but it doesn't look like my other O2 connector as it has only two wires. Any help is appreciated.

moejz

iTrader: (1)

if you are running an Aristo motor, it uses only one O2 sensor. btw, 2jzgte engines do run a bit rich from factory.

GoFastTSI

iTrader: (1)

Thanks man, much appreciated. I'm beginning to lean toward a boost/vacuum leak with one of the TT hoses/connectors. I have a single kit on the way which will alleviate a lot of that.