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

My 2004 Cayenne started missing. This happened pretty much after I put some fuel in it that may have been bad. I tried using fuel treatment, gas dry, etc but it still kept missing. Finally the CEL went on, code reader pulls cylinder misfire on 2,3 and 5

 

since the car has 107k on it and has never had coils or plugs I figured it was time since I know that is a common cause if misfire.

 

when I did the job I discovered that the coils were covered in a oily slime as well as the spark plugs. Only two cylinders were basically clean. The plug threads were covered in this crap too

 

please pics. I'm assuming this is not normal but is it simply from having bad/cracked coils or is more going on? 

 

Spark plug gaskets come to mind.

 

im a decent amateur work on many of my vehicles, so any leads would be appreciated

 

regards

 

roger

 

 

 

 

IMG_5519.JPG

Share this post


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

:welcomeani:

 

Looks like some type of anti-seize to me. Clean it all off the best you can - no anti-seize is needed.

 

A huge percentage of misfires on the early Cayennes are due to bad coil packs. Porsche changed these several times in the early 2000's.

I would suggest you start by changing them all to the latest version.

Share this post


Link to post
Share on other sites

Thanks for the info

 

i have owned this one since 38k the coils I removed (in the pic) have the VW symbol on them so I assume they are original.

 

the plugs came out easy, too easy based on my experience for a car with original plugs and 107k so maybe you are right about that slime

 

i went ahead and changed them all (coils and plugs) and it's running great again. CEL still on but I assume that will go out or I will clear it

 

just hoping I'm not treating the symptom and not the disease and will end up with messy coils and plugs and misfires shortly 

 

roger

 

 

Share this post


Link to post
Share on other sites

Yeah. I have the VAG code reader from Ross Tech from working on my Audis. Haven't bit the bullet to get the upgrade to read Porsche codes so all I can do with it on this car is OBD2 but I can still clear the DTCs

Share this post


Link to post
Share on other sites

You have to short pin 3 and pin 7 on your obd plug. If you are a bit advanced in soldering.... no problem. Then you can read all modules, delete the fault codes, change everything, write new codes and so on.... with RossTech and its obd module like a Touareg

Edited by ferri

Share this post


Link to post
Share on other sites

I have soldered a small cable inside the obd2 plug from pin 3 to pin 7 so they are shorted (I have vag-com too). Believe me, it's much better than durametric, more logical to use.

Share this post


Link to post
Share on other sites
7 minutes ago, ferri said:

I have soldered a small cable inside the obd2 plug from pin 3 to pin 7 so they are shorted (I have vag-com too). Believe me, it's much better than durametric, more logical to use.

I'm using Ross tech vcds also on my 06 ctt. I had No need to jump pins though as it read most common modules already on mine. I think as Mike zawowsky will testify the older cayenne was not so vagcom friendly. 

The main problem is no label files to describe what data your viewing. 

Share this post


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.


  • Similar Content

    • By PhoneyStark
      My Cayenne S 2008 won't start. I turn the ignition key and all I see is the Porsche (red) logo turn on and the mileage counter light turn on. Steering is locked, the head unit works and I can hear audio. Normally I would hear a click and then all the indicator lights would on and I would hear the soft beeps but now I don't hear anything. There is no steering / ignition faulty codes showing up on the dashboard. 
       
      Has anyone experienced this? Appreciate the help.
    • By Pkcayenne
      Hi all I’ve been fighting with the cayenne again 
      let’s me put the key in and turn it then I get steering fault as attached any ideas of a way around this or a reset thanks car won’t start 
       
       

    • By RevMatcher
      2002 911 C2 Coupe
      I'm having the classic misfire on cylinder 1 when the car is wet.  I used contact cleaner on the ignition wire plug into the coil and it works fine for now.  I/m sure when it gets rained on it will misfire again.  Already replaced spark plugs.  I discovered there is a tear in the little orange gasket (green arrow in photo) on the ignition wire connector and water is getting in there when it rains.  Anybody know where I can find a replacement without buying a new $812 engine wiring harness?
      Thanks
      Tom

    • By CAS-4S
      SO, I got a beautiful CEL on my 02 C4S coupe 6 speed with 63k miles on it. After diag, the shop found a misfire coming from 3 cylinders (#4,5,6). The initial recommendation was to change the coils and plugs. So I changed all the coils and plugs on both sides. After completion, the misfire was still occurring with a heavy rough idle, this time, specific to cylinder 6 only. Then, i changed the injector for cylinder 6 (shop recommendation). After the injector, the rough idle was still present with the engine light as well. Then, the shop performed a leakdown test and found gas in cylinder 6. They cleaned it up, swapped coils from 5 and 6 to test proper functionality of coils. The leakdown test did not show any leaks however. SO after this was all said and done, the shop put it in additive, filled up the gas tank, and drove it for 50+ miles or so. The car function properly according to them and I drove it as well, and there no idle, no shaking, no engine lights, nothing. A week after I picked up the car from the shop, the rough idle began again after I gave the engine a little rev. The engine light was flashing, and the rough idle began again. The shop said it could be the lifters for cylinder 6. 
       
      Any thoughts or anyone here experience similar issues with this? Any help would be greatly appreciated. I would like to gain some knowledge before taking it in back to them and throwing more money at this with no end solution.
    • By TJrob2000
      2006 CS Ti.  Approx 130,000 miles
       
      Recently the CEL came on.  My OBDII reader showed misfire for all cylinders (this was on a cold start, so not warmed up yet).  Previously it had shown misfire in the ready list so I figured this has been intermittent for a while although the car has been driving fine.  No issues with power, hesitation, fuel mileage, etc.  So, I went ahead and ordered the coils and plugs and changed them today.  Every coil looks perfect.  No signs of cracking anywhere.  The plugs also looked absolutely fine.  What I'm figuring (hoping?) at this point is the coils themselves are failing.  See the link for pics.  The service history I have shows these were changed at 102,000 miles with the 002 part.  The coils I installed are 012.  Not sure this is going to make any difference but time will tell.
       
      See coils and plugs here.
×
×
  • 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.