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If your boxster runs the same without MAF it's dead (the MAF).
The ECU rely on the MAF usually because it's a more reliable way to manage an engine, but it's not the only way it can manage it, that's why you see no change when you disconnect it. It's not relying on it anymore because it is not reading anything from it.
Not like when you get P1128 and P1130 codes, which mean that the MAF, MAP and O2 sensors reading aren't what they should be.
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