Jump to content
×
×

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Jack_H

Members
  • Content Count

    4
  • Donations

    $0.00 
  • Joined

  • Last visited

Community Reputation

0 Neutral

About Jack_H

Profile Fields

  • From
    Perth, Australia
  • Porsche Club
    No
  • Present cars
    Cayenne
  • Future cars
    Amg63
  • Former cars
    BMW 330ic
  1. *** update *** after writing my previous post, I pulled fuse number 8 (in engine bay) and the noise stopped. Put the fuse back in and the annoying sound returned. Out again and the sound stopped. Fuse 8 controls ‘Tank vent valve “ and a few other things. I guess I have a faulty tank vent valve. Now I need to figure out how to get to it and replace it.....
  2. Thanks Loren. After some more research, I thought of pulling the fuel pump fuses to see if the noise is coming from either of the two fuel pumps. It’s not. I pulled fuse 13 first, the noise remained and the car stalled after about 15 seconds. I put fuse 13 back in, started the car, waited for the sound to start again which it did after idling for about a minute, then I pulled out fuse 14. The engine kept running but the sound still remained. Listening to it some more today, it sounds like a vacuum valve or some sort of a vacuum related sound. My car does not have the exhaust/muffler valves that activate in sports mode. Is there any other vacuum valve or something similar in the tank?
  3. Thanks Loren. i checked the exhaust system/muffler mounts and all looks good. The sound seems to be coming from somewhere inside.
  4. Hi, i have a knock-knock sound coming from under my 2008 Cayenne S, towards the rear (in front of the right rear wheel). It sounds like it is coming from inside the fuel tank. i am not getting a check engine light and the car starts and runs as normal. The knocking sound begins about 3 seconds after the car comes to a stop and begins to idle. If I increase the engine revs, the frequency of the knock-knock sound does not change. Note that the sound is definitely not from the air compressor. Where could this noise be coming from? Thanks in advance for any ideas.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.