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Intermittent whine from front RHS wheel arch of 1999 996 C4

NickGin ABZ

New member
Joined
22 Oct 2011
Messages
3
Hello,

I have an intermittent whine noise from the front RHS wheel arch of my 1999 996 C4.

A MP3 sound file is uploaded. This was taken on a smartphone held nead the front RHS wheel arch.

I have taken it to my local Porsche specialist (non dealer) here in the UK, but we have not been able to isolate the issue.

Having browsed several Porsche forums, two potential sources are highlighted.

(1) The Porsche OEM replacement fuel pump, located in the saddle tank in the front of the 996. The fuel pump failed back in July 2017 and was replaced. The intermittent whine noise can be preceded by a "chirrup" when starting the car. The intermittent whine noise is heard around the front of the car, especially from the front RHS wheel arch area. We opend the fuel filler cap and listened into the C4 saddle tanks, but the whine did not appear to get louder. I would expect it to, if it was the new fuel pump making the noise.

(2) The AC system. In Aug 2017, the AC system was checked over and one of the front to back AC pipework components (or refrigerant line) was replaced as it was leaking. The system was regassed and is now running on Auto. The AC had not run from some years, as I used to live in a colder area of the UK.

Do the 911UK community have any suggestions on how to troubleshoot or resolve the issue?

Are there any 911UK forum threads that will help me here?

I have also posted this query on Pistonheads today.

Thanks, Nick
 
Cant see how to access the sound file :dont know:

You can email it to me here if needed ..

[email protected]

There is a valve on the fuel filler neck that can cause a similar noise remove the arch liner that side and see if its that you also have all the carbon canister setup there as well .
 

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