Sorry for all the questions lately, just trying to get the car perfect. A while ago i noticed that my O2 sensor has no effect on the car when plugged in or unplugged, i replaced it with a new one and there was no change. Today i installed a SFC Hyper R, it has RICH/LEAN monitor, so you splice into the O2 wire on the ecu harness. It just constantly says LEAN, which makes me think that there is a break between the O2 and ECU. Is it just a single wire straight to the sensor? If so could i just run a new wire and fix it into the Harness and connect it to the sensor? Cheers