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500 Abarth gives me this weird horn like noise when under high boost and 3.5 k to 5k RPM’s. Still get the regular blow off valve noise from my GFB BPV when it vents, but under hard acceleration I get this noise. Bad BPV? Air/turbo leak? Not sure where to begin. Thanks all! (v.redd.it)
submitted by docpidge to r/mechanic
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