Hey whats up guys I have a question. Well I have a 94 Coupe with a b18b1 and it has no o2 sensor and the ecu it has is a pr4. So my question is if I need the O2 Sensor? and do you guys think it will pass smog? It has the catalitic.

 

You will need an O2 sensor

 

so just by adding the O2 sensor i should be able to pass smog. Do you know if it affects the engine in any way by not having the sesor and is it ok with that ecu.

 

I would run a P75 instead of a PR4. Having no O2 sensor will make your car run rich, thus not passing smog.

 

ok cool, that is what I was planning on doing just wanted to see if I could do anything else. Thanks