Right now I have 2 o2 sensors on my b16 although 1 is not hooked to the ECU but just running my air/fuel meter. My ? is could this hurt performance. I have noticed my car runs a lot richer than my brothers b16a2 is this just the difference in the motors or is it because I need both o2's? I don't get any check engine lights. Thanks in advance.

 

You dont have to run both o2's its ok. I dont know why its running rich though. Look into this that could hurt performance.

 

I think you'll find your answer here:

https://honda-tech.com/zerothread?id=274113

 

Thanks T-Rex and sorry I didn't research better. Looks like I gots some wiring to do.....

 

im using one and its running fine...i tried to run both but it started to hesitate...i tried also switching them around...