like some know I've been having smoke(blue, white,grey) out of the tail pipe. I was told it was fuel related, and probably because the 2nd O2 sensor, is not connected to anything(wasnt aware of this). The car doesnt throw any codes. Does this sound plausible? need oppinions, tia.

 

2nd o2 sensor wont cause anything to happen

 

so if the second o2 sensor reads just clean air, it wont tell the computer to richen up the mix?

 

anyone else?