Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

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)

Weird noise coming from around the fuel tank nozzle...

Recommended Posts

This is on a 1997 Boxster (2.5L) 5-speed manual transmission with 33k miles.

After driving the car and then parking it and shutting the car off, I begin to hear a strange noise coming from around the gas tank nozzle and the passenger side front fender well. I'm not even sure how to desctibe the noise, but almost like a droaning/bubbling noise. After minutes of being puzzled I unscrewed the gas tank cap to let the vapors out and the noise stopped... I left it unscrewed for maybe about 1 minute then screwed it back on and the problem was gone.

I'm at a complete loss, but does anybody know what this issue could be? Off the top of my head I thought maybe something with the fuel pump or fuel lines? Maybe a bad charcoal canister?

Thanks for the help!


I just took the car for a 15 minute jaunt around the neighborhoods. Got back home, parked it and no sound. I'm wondering if it's only on long drives.

Edited by El Patrick
Link to comment
Share on other sites

  • Admin

This is why people become Contributing Members here - because they have access to Porsche documentation.

From the TSB...

"Concern: At an ambient temperature near 41° F (+5° C) or lower, a humming / vibration noise may be noticeable after cold start for approximately 30 seconds.

Information: This noise is caused by oscillations in the fuel system piping. This noise is mainly noticed in the dashboard area or front luggage compartment. As of February 10, 1997, production and engine number 65V 04654, a modified fuel pressure regulator and fuel return line are installed.

Repairs: In case of a customer complaint, the new fuel pressure regulator and fuel return line can be installed.

Parts: 993 110 199 01 Fuel pressure regulator

996 110 316 07 Fuel return line"

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • 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.