[Fasterthanyou]

Total farse. Seller is taking advantage of young dumb consomers. Dumbasses giving him positive feedback are trying to justify their purchase.
Not that I want to sound like a know it all... again, and I do know I come off like one frequently BUT, these things can work!
OEM ecm's are designed for emissions purposes even under WOT. Better emissions doesn't mean best power. Your car, no matter how you lie to the ecm, will always compensate using the o2 sensor under part throttle. Under WOT it uses what it "learned" from part throttle do do open loop fueling. During open loop fueling the sensors and calibrations can be manipulated to change the AFR and/or timing for best power and not just best emissions. I bet his "juice box" is nothing more than an inline resistor that would offset the actual reading. The old school trick was to replace the whole sensor with a resistor value, newer OBD code checks to make certain the CTS is working like it should. Although I'm not positive if OBD-II standerdized any way of checking for a "stuck" CTS sensor value, so maybe this juice box is just a resistor. I think it's funny he said diode on his ebay auction, what a dumbass, a diode would do nothing.