I have just fitted a pfc to my 1996 fd and am unsure if the standard map is ok to run on the second boost setting, as in will it automatically reset the fuel to run higher boost??? is this safe?

At what point will I have to think about injectors and fuel pump

Current mods: straight through exhaust, mildly uprated intake and ic
also reading the o2 sensor what voltages indicate what sort of fuel ratio?