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I ran the tank dry today and filled up with 102 German octane fuel. It's the highest possible setting in Germany. The engine is still "knocking" the same. The only thing I keep noticing is that the low-pressure pump very often drops below 3 bar during acceleration. There's a constant 15V at the tank module. As soon as I stop accelerating, the pressure in the tank jumps to over 5 bar. I think this fluctuation and the sharp drop in pressure despite 15V is not normal.
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