AFR Sensor Enahncer For Use With Hydrogen Generator Systems- Supplement HHO Dont confuse the AFR (air fuel ratio sensor) with the typical o2 oxygen sensor on most vehicles. An AFR sensor is found mostly on the late model Toyotas and is positioned in the exhaust before the catalytic converter and monitors the oxygen content of the burned fuel, much like the O2 sensor that occupies the same position. The Air fuel ratio sensor uses current instead of voltage for the signal measuring to the computer. The AFR sensor is typically called a wide band o2 sensor. Adjusting this can lean out the engine almost twice as much as the typical narrow band o2 sensor, so given this fact caution should be exercised so that you do not over lean the engine and cause possible engine valve damage. For hydrogen generator usage, typical adjustment will be less than half clockwise turning of the adjusting screw potentiometer located below the pilot light. A total of 5.2 milliamps will be the output if turned all the way clockwise to full open position which is way more than needed. A mileage test after a ¼ turning of the screw is recommended then go up from there if need be but not over ½ way. If you would like one of these devices, contact us below. LaBellas Auto Repair 2641 Delaware Ave Kenner Louisiana 70062 504 469 9986 labellas@cox.net labellasautorepair.com HHO Sales, Testing, Installation