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    High pitched whistle after blanking EGR

    So I have a 2010 VW polo 1.6 tdi (75bhp) and I’ve recently Blanked the EGR pipe that connects to the throttle/intake with plates and from doing that it now has an insanely loud whistle when it builds boost at 1800rpm and upwards it will do it on deceleration aswell, it will only do it when the...