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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










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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.

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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 





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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
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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. 

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