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

    You can remove these ads by becoming a Contributing Member.

On 2-7-2017 at 6:58 AM, ma77hewsu11ivan said:

Ended up ultimately being my high pressure fuel pump. Decided to replace my entire fuel system + HPFP. Not a bad DIY. Moderately expensive. Tight spaces to work. 

Did you got an Check engine light?

Link to post
Share on other sites

No CELs initially. First symptom: random long starts. Second: smell of burnt plastic. Third: more consistent longer starts. Then: total failure at highway speed. Scared the heck out of me. Nursed it home. Diagnosed left fuel pump (primary) bad, swapped it out. Improvement. Then fuel filter. More improvement. Then right pump & FPR. Better still; all the while dreading the ultimate reality that my HPFP was also bad. Finally swapped out a rebuilt Porsche HPFP (thing was actually new) and talked PCNA into helping me out. They sent a $500 voucher. Why? Because I asked nicely. Also my car previously had the service campaign for the HPFP and the unit I pulled off was the newest revision so I'm likely now on at least my 4th HPFP in 158k miles.

 

 

Sent from my iPhone using Tapatalk

 

Link to post
Share on other sites
On 7-7-2017 at 6:02 PM, ma77hewsu11ivan said:

No CELs initially. First symptom: random long starts. Second: smell of burnt plastic. Third: more consistent longer starts. Then: total failure at highway speed. Scared the heck out of me. Nursed it home. Diagnosed left fuel pump (primary) bad, swapped it out. Improvement. Then fuel filter. More improvement. Then right pump & FPR. Better still; all the while dreading the ultimate reality that my HPFP was also bad. Finally swapped out a rebuilt Porsche HPFP (thing was actually new) and talked PCNA into helping me out. They sent a $500 voucher. Why? Because I asked nicely. Also my car previously had the service campaign for the HPFP and the unit I pulled off was the newest revision so I'm likely now on at least my 4th HPFP in 158k miles.

 

 

Sent from my iPhone using Tapatalk

 

Did you have a very rough idle at cold starts?

Link to post
Share on other sites
7 hours ago, ma77hewsu11ivan said:

Yes. Very rough idle at cold starts.


Sent from my iPhone using Tapatalk

Do you have any idea what your actual HP value is and what the Setpoint value is? I want to compare with mine to check if my HP pump is indeed failing.

Link to post
Share on other sites

Should call for and receive 40mb at idle. Mine would sometimes get that, I'd think GREAT then go for throttle up and it'd bog down... Replacing the entire LPFP system that was 8 yrs old helped quite a bit and was absolutely needed, but ultimately it was the dreaded HPFP. Call Porsche and see if they'll help you. They sent me a $500 voucher simply for asking. Rebuilt units (new really) can be found from dealers for around $800usd. Installed it myself. Been running fine since. Future prevention measures: refill my fuel tank now at 1/4 or higher vs letting it run until the light comes on and changing oil more often (5k-ish) with a quality oil (I use Amsoil).


Sent from my iPhone using Tapatalk

Link to post
Share on other sites
3 hours ago, ma77hewsu11ivan said:

Should call for and receive 40mb at idle. Mine would sometimes get that, I'd think GREAT then go for throttle up and it'd bog down... Replacing the entire LPFP system that was 8 yrs old helped quite a bit and was absolutely needed, but ultimately it was the dreaded HPFP. Call Porsche and see if they'll help you. They sent me a $500 voucher simply for asking. Rebuilt units (new really) can be found from dealers for around $800usd. Installed it myself. Been running fine since. Future prevention measures: refill my fuel tank now at 1/4 or higher vs letting it run until the light comes on and changing oil more often (5k-ish) with a quality oil (I use Amsoil).


Sent from my iPhone using Tapatalk

hmm half of the people i talk to tell me it should be that low. Others tell me it should be 40 bar tot 120 bar when running (40 bar for idling)

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.

Guest
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.