So I bought a truck thats well known around where I am from and it was tuned with HP so I cant see the tune file; it just says its been locked but its not. I am trying to log everything so that I can then build my own tune with efi live but I can not figure out how to watch the A/f because I dont have a PID for that and ive been trying for days to figure out how to do this. Any help would be GREATLY appreciated!!