Question about 2003 Porsche Cayenne
You may need a new wiring harness. They have to be ordered from Germany. This is my guess. (I am having a similar issue with my '94; rough idle, #4 cylinder not firing intermittantly, replaced plugs and 8 ignition coils; new harness is my mechanics guess)
cheers and buena suerte
Posted on Jan 26, 2009
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Posted on Jan 02, 2017
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