This is the second time that happens to me, My NGK AFX its reading 13:8 and my scanner its reading around 14:6.
Even at WOT the scanner reads 12:2 and my WB reads 11:2.
I don't know what happen last time i stop tuning it due to work for a couple of weeks when i got back to work on it it read the same.
I try doing my own on the user defined for my WB and it read the same. Who had this problem before, or what can cause that?
The weird thing its that i plug it at a friend truck and it read the same.