I was wondering if it is possible to convert obd2 hatch to obd1 without buying a conversion wire harness? Is it possible to wire one up? I want to get rid of the second o2 sensor in my engine along with better fuel management. Also, does anyone know which wire on the o2 sensor is the signal wire and which one isn't? Theres 2 wires but ones green and the other ones yellow so i don't know. Thanks