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MAF scaling beyond 4k rpm on fa20dit WRX

Practical Reflash Tuning

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I've managed to successfuly scale MAF sensor on 2018 WRX with COBB guide using SubaruEdit (EcuFlash) but only in range up to almost 4 volts as after open loop kicks in - there's no correction logged. Can you help me understand how to turn on closed loop properly for fa20dit wrx with SubaruEdit?

I found 2 values which I suspect might do something

1 closed/open loop min load (screenshot attached)

2 A/F learning #1 breakpoint (which is set to 4800rpm, is this what I look for?)

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