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"Yeah, there is a bit of a "buffer" in what Nissan thinks is safe and what the average tuner thinks is safe, but still... completely disabling one or the other of those two sensors is a recipe for disaster."
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I can see how you would think that.
BUT notice that the MAF reading is set to factory default failure code - forty below. Colder the air, the denser the air, less particles can be suspended in it - so the the ECU compensation by running the richest it's program will allow. After that, just make sure your mapping is right so that you don't run too rich.
As a matter of fact, fouling plugs has been our only problem. We haven't had a single lean out in about 20 cars over the last 3 years, and at 52k miles my Z is just fine.
As for GIAC..I don't know. That is why I am posting, to gather info. It's always just a matter of electronics these days. If someone knows where I can buy Porsche diagnostics for out CONSULT station here at the dealership our Techs could figure a lot out.
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