I have observed that healthy INTJ's typically have a certain kind of personal integrity that makes the idea of being wrong, deliberately misleading someone, or in some cases even behaving unjustly rather abhorrent to them. This is partially based on their Te, to be certain, but the way this Fi works in service to Te is apparent in other ways, such as their tendency to refer to themselves and their own state when discussing emotions, and that their emotional preferences/standards don't seem to be affected much by what others think of them (at least not in the same way mine are), all hinting that Fi > Fe for them.
Regarding INFJ's, I have less to go on. The only (potential) examples of INFJ's and Ti I actually have to offer are myself and toonia. I likely don't understand the nature of Ti well enough to speculate here, but I would guess that it is the reason I seem to tend towards trying to understand something as well/precisely as possible, and nitpick about points most people would consider insignificant. toonia seems to display a similar tendency in the the former, but I'm not sure about the latter. This could also be the source of the 5 wing many INFJ's reveal in Enneagram testing (They usually test as 4w5).
So, does anyone have ideas to share regarding this topic?