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

hi all,have 997 MY05 and have misfire codes and check engine light on. if i start car and drive its fine until i come to traffic and idle or low revs for a minute or so then starts to misfire and gets worse,sounding like bag of nails. if i then switch off and restart then problem gone until next time i hit traffic. had it on piwis and says misfire for cylinders 1,2,3 and if leave for longer misfiring then 4 and 6 appear. the problem also clears if i erase DME faults. i have changed all coils,spark plugs and aos but still have issue.

also if i activate camshaft adjustment on piwis when running there seems to be no change in engine revs.

any ideas before start looking deeper?

Link to comment
Share on other sites

  • Admin

hi all,have 997 MY05 and have misfire codes and check engine light on. if i start car and drive its fine until i come to traffic and idle or low revs for a minute or so then starts to misfire and gets worse,sounding like bag of nails. if i then switch off and restart then problem gone until next time i hit traffic. had it on piwis and says misfire for cylinders 1,2,3 and if leave for longer misfiring then 4 and 6 appear. the problem also clears if i erase DME faults. i have changed all coils,spark plugs and aos but still have issue.

also if i activate camshaft adjustment on piwis when running there seems to be no change in engine revs.

any ideas before start looking deeper?

Can you give us all the fault codes?

Link to comment
Share on other sites

the car has 54k miles on it. the fault codes are the usual of

P0300 multiple misfire

P0301 cyl 1 misfire

P0302 cyl2 misfire

P0303 cyl 3 misfire

and if i leave it rough running for few minutes more it will then show in addition

P0304 cyl 4 misfire

P0306 cyl 6 misfire

even when left for ages running badly and misfiring and spluttering i have never seen P0305 come up or any other fault related to the suspected variable cam timing solenoid on bank 1.

when i compare the readings of bank 1 and two in actual values of cam adjustment it seems that values on bank 1 seem lazy

hope this helps with your questions?

Link to comment
Share on other sites

I am not sure if this will help, but my car had the same problem, and here are the things that was done, I am not sure which helped, but one did:

Change all coil packs, sometimes they have cracks not visible with eye.

Changed all Plugs

Change oil (Sometimes oil gets a bit old) the cars are very sensitive

Replaced all the lifters ( At any time through life of the car, if bad oil was used, or sat for a while) lifters can get sticky

cleaning the Intake.

Hope you best, it is really frustrating.

Bobby

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.

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.