I don't know if this video has been mentioned here before but I have found it very useful to explain how a hot wire EFI system works and the main parts of the system.

[ame]https://www.youtube.com/watch?v=C9PVCuyLDQM[/ame]

I hope it is useful to someone here.

It has some tips on how to adjust the fuel air mixture screw and the idle screw and so on.

Anthony