I installed 772 kit 3 months back on my Corolla 2000. Tried Performance Chip, didn't work, tried simple MAF enhancer (using 47K resistor with 50K variable resistor), I can see engine going leaned when I adjust the MAF enhancer, often resulting in engine light.

Even with all adjustments, the mileage is still under the regular performance (without HHO). I used to get about 12KMs/Liter and with HHO its around 10.5 even with MAF enhancer.

I My HHO is running at 20Amps (idling - around 680RPM) and 38Amps (when car is running - high engine RPMs 1200+RPM).

Can any one please share his or her findings if experiencing great performance/ mileage improvements? What should I do further for improvements? One last thing I can try now is EFIE, but I am just scared of installing it as its very complicated to approach O2s and even after spending so much efforts, what if there is no results???

Thanks!