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Unless you have a wideband O2 sensor, all that gauge is doing is telling you if your stock O2 sensor is working. It is rather a pointless gauge.
It can not read under boost.
It only reads A/F at idle and cruise. Any other condition and it will most likely just light everything up. The stock O2 sensor simply reads a narrower band of information than a wide band O2.
As long as the gauge fluctuates at idle and cruise, you know your O2 is working.
It will NOT tell you anything about your A/F ratio for performance.
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Forum for every generation Toyota MR2. Including the AW11 and SW20.
Linear Mode
