Strange Sound

[tac27]

I'm trying to track down a strange sound that I have began hearing; I'm wondering if someone else has experienced something similiar and can share.

The best I can describe it is that the sound is very similiar to blowing across an empty Coke bottle (the old glass type); the pitch and tone is even very similiar.

I drive a '03 996 cabriolet and I have not noticed the noise while the top is in the 'up' position; I really only notice it when driving around the turns inside the parking garage where I work when the top is down.

My general impression is that it is comming from the rear of the car and it typically will only last for three or four seconds.

It doesn't appear to be the same tempo with the engine; If I speed up, slow down, or just blip the throttle, the sound doesn't speed up, slow, or 'blip.' Also, I have tried braking to see if that stops it; sometimes it does, other times it doesn't, but when I can bring the car to a complete stop the sound stops too.

Lastly, it doesn't occur very often, maybe once or twice a month.

Thanks

Tim

Las Vegas

[toddel68]

I have a sound I would describe similar or even as if somebody was honking in a distance. I always thought it's coming from the motor bay and the sound was never really loud. Thanks to my PSE I usually only noticed it when waiting at a traffic light. Lately, when I got out of the car while the motor was running, I realized it's coming from the right front where the horn is located. So I guess it could also be a leakage current getting to the horn. Maybe you have the same problem. Personally I chose to ignore it for now.

Thorsten

Edited May 15, 2009 by toddel68