Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, WERE due Dec 4th, 2022. 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)

cold misfire and cel on


Recommended Posts

Hi everyone. I have a Cayman S 2006 here and has a random misfire only from cold. With the Piwis it gives fault codes P0300,P0301 and P0303. I have changed all coils to updated version and spark plugs although all looked good. I changed the AOS as found small amounts of oil in the intake but still get same codes.

Start from cold and after a minute or so misfires, CEL on and running rough. If I turn off and restart everything clears. sometimes it will come back on soon after but usually then its totally fine. Any ideas? Am going to play a little more with PIWIS but all activations etc seem normal but I only have a few minutes when first run engine everyday or I simply end up with good running engine and the fault codes above.

The camshaft deviations and figures seem to be ok as I just checked them.

Edited by topmech0
Link to comment
Share on other sites

  • 4 months later...

Hi,having same problem with my 06 cayman s.However it will throw a CEL when revved over 4000rpm.I believe variocam system not working.New oil,filters,plugs,variocam solenoid and rest of solenoids checked and still no cure.Car runs perfect 1000-4000 rpm so dont believe its a mechanical issue,more electrical? Please help!!

Hi topmech0,did you get your problem sorted?


Link to comment
Share on other sites

Mine was the solenoid for the valve lift system. The one nearest to middle on each bank. I found it by swapping left to right then waited for CEL to come on and hey presto the fault had swapped sides to cyl 5. Swapped for new and no problem since. 

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.