Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

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)

Recommended Posts

Hey everyone,

I have a 2005 S with about 135K on it (almost all me :D ) and the engine is stalling out, almost as if it is being fuel starved, about 20-30 seconds after starting. For the first 20 seconds I can rev it and move it (small distance!) with what feels like normal power, but then it slowly (5-10 secs) had lower idle, becomes less responsive and then stalls.

All maintenance done, fuel/air filters changed, nearly full tank... My thought is the fuel pump...


If you also think fuel pump, anyone change it yet?

Thanks in advance!


Share this post

Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

There are two fuel pumps. It's the main fuel pump which is the left pump that needs replacing. Change the fuel filter at the same time.

Share this post

Link to post
Share on other sites

wvicary - what is the "logic" on which pump is running?

I know if you remove the fuse for one pump - the other one will run when you start the truck.. and vice-versa.. (this is handy for determining which pump is kaput..)

I thought the idea was to have two pumps since the tank is a saddle tank (two chambers with a high connecting passage between them) and one side will run low so the other side picks up, plus on a steep sideways incline gas will run to the lowest side of the tank, leaving the pump exposed on the other side..

Share this post

Link to post
Share on other sites

Thanks all for the comments...

It was the left side fuel pump... Diagnosed via the pulling of the fuses method...

I ran totally out of time and needed the vehicle back, so actually went to the dealer, price was not TOO bad :huh: , but the convenience was there...

They have not had a lot of these go bad yet, so the writer was curious as to how I diagnosed it... :king: Thanks again everyone!


Share this post

Link to post
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.