In the video show a waveform from a Hyundai Sonata and he measure the two wire of the injector, is confusing but when Paul do the match an link the two waveform is when the waveform of the injector make sense.
For the people that do not have a picosope. In my case I have a Snap on Modis can we measure the voltage en the positive side of the injector and put the ground lead in the ground side of the injector to be able to see the waveform you see went you match the signal. Here were I live is no very usual to see GDI engine but I'm preparing myself because is the future.
I don't know if you guys have ever done that. or someone can try it!.