The last thing you want to do is burn your motor out.
Another thing about running a motor lean is that it
is the metal surfaces that get hot and the temperature
doesn't necessarily make it to the heat trashcan (radiator).
So what can happen is that you can burn out your
outlet manifold valves even when the temperature
looks 'normal'.
Apart from that, you can congratulate yourself in
that you successfully were able to use the efie to
lean your motor out.
That part at least did work.