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)

2006 Cayenne TT - Poor start and running after fill up

Recommended Posts

I did find someone on the site who had a similar problem but no resolution. My car runs like a dream but the last two times I filled up, it would not start for a few seconds immediately after filling with gas. It starts after a few seconds cranking but not on all cylinders but clears up after reving for a couple of minutes at 1000 rpm or so. It feels like the motor is flooding but this only happens immediately after filling. I also got the CEL on later the same day though it also goes out after a few days of running. Any suggestions before I put the Durametric on tomorrow?


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

Pulling the codes from durametric Will help narrow it down. But the usual culprits for these symptoms are, check valve, vent line, fuel filter and lastly fuel pump. Any of these are DIY projects. Lots of information posted on forum. I will look for some diagrams/part #'s

Link to post
Share on other sites

I would start with Check Valve and Vent line this seems to be the most common. I have attached the diagram...

Vent line part # 948-110-202-01

Check Valve Part# 948-107-219-50

If you cant start your car or it runs for a few seconds quits and you cant start it most likely its the fuel pump.

check valve.pdf

Link to post
Share on other sites

Many thanks guys. I put the Durametric on and had so many error codes (none of which were currently "active") that I cancelled them all until the next fill up. The vent line is all new as I replaced it when I did the coolant pipes but the valve looks to be favorite and easy to get to. I will see if it can be rinsed through with carburetor cleaner before I replace it though just in case it is just gummed up. I will report back when I get a result (or not)


Link to post
Share on other sites
  • 3 years later...
  • Admin

I have the same problem too. However, I did notice if I immediately cap the tank off after filling-up......it starts right up. I have been getting codes of:






Still the vent line?


or the seal on the gas cap.

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.