I have a 96 delsol, b20vtec... I am flashing the 02 sensor code considering I don't have any hooked up atm moment, long story yes. But somedays I can smoke a h22 Hatch, and others I bairly get a stock LS integra, could this be the engine code causing my motor to run lean or rich... is it causing my car to run good somedays and crappy others?

 

if the Car is throwing an O2 check engine light.....it will go into default mode, and run like crap. Had a bad o2 sensor in my ex......ran slow at the track, then I put a new one in, e.t. dropped like half a second and trapped like 5 mph higher.....I suggest ya fix it

-jase