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Howling noise from gas Flap area

Fuel System

Vehicle Information: Year: 2003; Engine (type, size, modifications): 2.7L; Total Mileage: 25000; Transmission: Manual;

I have finally tracked down the cause of the howling noise. Through some experimentation, I have concluded it is caused by air rushing by or through the large (1/2" diameter) vent hole at the very front of the fuel filler compartment. I have been able to completely eliminate the noise completely by applying some electrician's plastic tape over this hole. I also have met with the Porsche Regional Service rep and my dealer tech who claim they are unaware of the problem and therefore do not have a positive fix for it. The tech attempted to resolve the problem by "kinking" the air routing hose behind the vent hole to eliminate the noise but I haven't verified that it works. Will keeping the tape over this hole compromise the vapor recovery system and cause vehicle/engine performance issues later? I have noticed that this hole has been elimited in the new 987 Boxster!

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