Unfortunatly, the vehicle's Oxygen Sensor is expecting the same amount of unburnt oxygen to come out of the exhaust, and when it doesn't detect it, the vehicle computer increases the fuel flow rate in order to get back to its normal factory setting With the bigger HHO Generators they will continue to pull more amps as the generator heats up. The PWM (Pulse Width Modulator) is used for controlling amperage draw. - 2 Basic and Advanced MAP/MAF Sensor Adjustor Plans The technical performance of the unit is very good as it produces 100 litres of HHO gas per hour (1.7 LPM) with a current draw of only 20 amp 6. "How To Build A 200 watt Wind Power Turbine" For this reason, a device called an E.F.I.E. (Electronic Fuel Injection Enhancer) is needed. Don't spend money on some single set of plans. The main PVC booster pipe length can be adjusted to suit the available space under the hood of your vehicl Take your pick from the variety of designs available in this set!! From basic to advanced, we have it al Multiple HHO Plans Hydrogen Generator DIY MegaPack