Wideband kits typically provide two distinct outputs. One is a 0-1v narrowband simulation and another is a 0-5v wideband output used for datalogging more precise A/F ratio data. You would typically run the narrowband output to the ECU's front O2 input so the ECU could run normal closed loop off this signal and then run the 0-5v output into a different ECU input for datalogging purposes.

With ECMLink's narrowband simulation function, you can simply run the 0-5v output to the ECU and then configure the ECU to produce the 0-1v simulation internally, thus freeing up an additional input on the ECU for some other aftermarket sensor.

The help file included with the ECMLink application goes into detail about the process of configuring the NBO2 sim tab for your own setup. Please refer to this for more information. The best way to determine your own switch point is to datalog the wideband kit while running closed loop off a stock narrowband sensor and then simply take an average of the raw wideband voltage (available in the datalog as a Raw value) while the narrowband sensor is cycling normally. You can select such an area in your datalog with the mouse and then right click and do a “Selection→Average” to have the application average the values for you.

Some common stoichiometric (14.7:1) switch points are listed below.