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knocking or pre

  1. 147 1.6 120 Engine Knocking/Pre ignition noise

    Alfa 147, 156 & GT
    I noticed a rattling sound when switching into third on low rpms (2000-3000). It happens regardless of load, and cant be reproduced with letting the RPMs fall and rise again, only with gear changes. I had no idea this is the knocking noise, I thought it was something completely irrelevant. I...