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    00 Explorer XLS 4.0 HHO + EFIE Enhancer

    I am installing an HHO/Hydrogen Cell in the next couple of weeks. I already installed a dual Oxygen Sensor EFIE + a 30 Amp PWM. Question. Can a MAF sensor be use to lean out the fuel ? Does anyone has MPG Numbers after installing HHO ? IWould be interested to see what others are getting...