Air/Fuel Gauge bouncing around

[Eclipse98_RS]

I recently bought a 98 GS-T with these mods.
T3/T4 50trim
turbonetics manifold
tial 38mm wastegate
turbonetics boost controller
2.5” Turbo back exhaust
Precision FMIC
Custom Intercooler piping
Injen Intake modded to 3"
550 Injectors
Apexi s-afc II
Act 2100 clutch
Hks ssqv Blow off valve
A-pillar 3 gauge pod
Boost gauge
EGT gauge
Air/fuel ratio Gauge

The exhaust manifold only had two bolts on it connecting to the turbo. What my question is is the air fuel guage seems to bounce from one side to the other and never really sits in the stoich range. Is this because the SAFCII hasnt been tuned correctly? or is this because the exhaust is leaking out of the manifold making the guage have to constantly re-adjust itself? Im going to bring it into a shop in a few days to get some work done on it and want to be sure i know what im talking about when i tell them what is wrong. Any feedback on this would be appreciated.

 

[Jeff822]

If its not a wideband air/fuel gauge dont pay any attention to it, its just a light show.

 

[blackGSX2g]

Your narrowband o2 sensor is there to give feedback for your fuel trims. To do so, it gives oscillating signals; I.E. high and low. This is shown on your gauge has 'high' and 'low'. Don't pay attention to it unless it stops oscillating.