Originally Posted by Kingtal0n

And also, since this is tuning into a tuning night,


What you are probably seeing is called transient delay. The injector has to inject the fuel, the engine has to burn it, and it has to get into the exhaust system, before the narrowband can "see" it. That all takes .250-.700 milliseconds depends on the RPM where you cruise and where the sensor is. So when you are looking at those graphs, the narrowband is always slightly behind whatever the injectors are doing.