There are commonly 2 types of Oxygen Sensors found on engines, Narrow and Wideband. As the name suggests, a Wide band Oxygen sensor (O2 sensor) is capable of reading a wide range of fuel mixture ratios, typically reading from 8.0 - 22.0 parts of Oxygen to every 1 part of fuel, also called the 'Air Fuel Ratio' Wideband Oxygen sensors are composed of ceramic, platinum and other precious metals and have a 'heater circuit' built into the sensor. A Narrow band sensor usually reads

Most aftermarket ECUs and almost all factory ECUs have Closed loop fuel control. To obtain Closed loop fueling you must have an Oxygen sensor (O2 sensor) and an ECU able to read the voltage from it and adjust the fuel mixtures either + or -. O2 sensors come in many variants, common types ranging from 1 wire upto 5 wire and in narrow or wide band (annother blog). Closed loop fuel control usually happens at idle and low engine speeds to achieve the optimum air fuel ratio (AFR)

We are spoilt for choice now days with a vast range of ECU manufactures but there are many questions your should ask yourself when selecting an ECU for your particular application and here some of them: How many ignition and injector outputs does the engine need? How many aux inputs and output does the engine need? Is the software user friendly? Does the ECU require further add ons to run correctly? Will YOU receive all the support and help you need from the Dealer? I persona