You're trying to run in open-loop mode all the time?
Why!?! The O2 sensor and closed-loop fuel control is a great technological advantage: You'll get more torque, less detonation, better throttle response, and more MPG.
Don't ditch it on a whim.
It can be done though (I still don't know why) - just purchase an upscale aftermarket ECU (like a motec M4) and build the fuel maps on a dyno with a wideband O2 and and EGT sensor. (See, you still need an O2 sensor to tune it!)
