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I have observed there is a fluttery sound when the engine is in vacuum, in other words when the blowoff valve releases pressurized air. This is a V1 HKS kit .
Since the car comes off the road Nov 1, I am holding off removing the front bumper until then.
Has anyone else experienced anything like this? I'm hoping the valve is the cause as it sure sounds like it. No CEL lights or issues otherwise, just an annoying sound. Ideally, I can fix/clean the valve itself but Im expecting a torn or frayed membrane/flap maybe?
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5:AD kit, HKS V1+ S/C, ECUtek dyno'd, Ohlins MP20, Magnaflow cb, Revworks UEL, Topspeed overpipe, Pinnacle Ceramic tint, VG shark fin, HID's, yellow DRL's, full LEDs, red floor lights, Homelink mirror, trunk lid liner, Perrin LWCP, Valenti smoked, Flossy Grip Tape Shorty, GT86 plaque, lighted vanity mirror, Michelin PSS, Project mU +800, DOT4 fluid, 720 Form GTF1 17x8&9, stitched leather bits, EZ valve.
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