if theres no emissions, is there any use of having o2 sensors? why or why not?
thanks

 

car wont run properly, and your gas mileage will go down the to like 7mpg, they are not holding any power back from ya,

 

You'd still want/need a pair of O2 sensors so the PCM will be getting the correct feedback. If you keep the O2's off your gas mileage will fall. The PCM uses the O2 sensors to report whether the car is running rich or lean.

 

It's very possible to run without O2's. It's called an Open Loop tune. The car will run off of the VE tables (or MAF tables depending on year) ONLY, so if you're planning on it make sure your tune is good first.