Quick update as promised.
Car was throwing a couple of codes:
P0106 and P006A: MAP sensor codes bc we did not disabled them on the tune we loaded. I went into limp mode once because of this which scared the sh1t out of me. The car made some weird chattering noises while in this mode when I got on the throttle, I cleared the code, restarted the car and the engine was back to being super smooth. I stayed out of boost until the codes were disabled under DTC in uprev.
P0420 and 430: Catalyst system error, again we disabled these on uprev since I no longer have cats.
P0300: random/multiple cylinder misfire. Still not sure on what caused this, FSM says check spark plugs, coils, injectors etc. Johnny made a couple of adjustments to my fuel table and I have not gotten the code since, we'll see.
The only problem I am having now is a clicking noise under the dash near the accel pedal when I'm above 2500rpm, the higher the rpms the faster the clicking.. I found this TSB that describes my issue exactly, but I am not sure if this is indeed what is going on:
Tsb: 2007-2009 nissan z; tapping noise from dash area when engine is running