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  1. Resonance at 1400rpm

    Alfa Giulietta
    Hi, I've been kicking around this forum for a while but just bought my first Alfa, a 2011 Giulietta 2.0 170 Veloce. The car has some refinement issues that I'm trying to fix. The biggest issue I have is a 'hollow plastic' sounding vibration/resonance at 1300-1400rpm; whilst really quite loud...
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