Who is tuning this? You don't have a boost leak, a boost leak would drop pressure, not MAF voltage, which measures flow.
Sounds like you guys are using OEM O2 sensors to measure a/f, which are not accurate in this range.
With ECU TECH, why not use MAP? It is much more reliabe than MAF sensors.
Also, which charge pipes do you have, what boost pressure are you at, and what is your current power output?
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