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Cayenne Rough Idle and Shakes bad on Acceleration?


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HiUsually posting on 997 Turbo Forum, but need a little help from the experts here please.Went to Chicago in friends Cayenne 05 6 Cylinder. Ran great all the way there and driving around town. On the way home on acceleration to get on interstate it started running rough...hard to accelerate, and shaking like crazy, as if you were running over bumps....Thought maybe transmission. Would run better in 5th gear, but when shifted to 6, would start shaking bad...Also getting 10 MPG!! on way back... So hooked to my Durametric when I got home and it read out almost every cylinder misfire ( P0304, P0305, etc.)....I pulled plugs and coils and several of them were wet and smelled of gas...I have read about the coil pack going bad...Would that cause misfires on all or several cylinders, or what else could it be?? Also code P01060 - Oxygen Sensor Bank 2 no signal (maybe due to coils??)Thanks in advance for any helpWould this be a bad coil pack?confused.gif

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Could very well be a faulty coil pack as they have been updated several times and I believe there is also a fuse for the coil circuit.Its common for water to migrate into the spark plug area and damage the coils. Do not operate the vehicle if the check engine light is flashing.

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Could very well be a faulty coil pack as they have been updated several times and I believe there is also a fuse for the coil circuit.Its common for water to migrate into the spark plug area and damage the coils. Do not operate the vehicle if the check engine light is flashing.

Thanks! We'll see if the plug and coils change fixes it. Got all ordered. Going to change them all while at it :)

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  • 4 weeks later...
  • 2 weeks later...
Cardan shaft replaced. Didnt take long to go from vibration to the sound of live fire. I wasn't prepared to hear that sound from that car. Luckily made it to SpeedSport Tuning in Danbury CT and repaied overnight. The car drives much better, especially in Sport mode, which leads me to think the shaft joint deterioration affects performance over time, but slowly enough that its not so obvious. Boiling a frog analogy. early warning would be nice.
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