Jump to content

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

Posted

I've been chasing a rough idle for almost two months. 2011 Turbo, 120,000 miles.

There was a code for the 'valve lift controller.' Also got a check engine light. Oddly, it runs fine beyond idle besides a slight initial hesitation. Got another controller, but apparently there was a part change midway through production and it was incorrect. So we got the right one. 

After installation, no change. The mechanic wasn't satisfied and got another. Same result.

Then someone on another forum mentioned first get Cayennes had a screen in the oil passage below the VLC which clogged.

Calling upon a previous similar issue in the LS of my Silverado where the screen in the oil pressure sensor gets clogged, I thought trying some Pennzoil might help. It works there so it may here as well.

(BTW, checked the parts diagram and even asked Gaudin Porsche parts folks--there is no screen in this engine. Perhaps a very small oil passage.)

The result is that while the engine is cold, the idle is still rough. When warmed, it is fine. Interestingly, shutting off the engine while rough usually smooths it on restart.

The engine light has gone out on its' own.

Ideas? I can't have the lucky sole example of this problem.

 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • 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.