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Could be a bad valve lifter (Vario Cam+ system on DFI V8 engines), bad injection pattern, damaged butterfly valve on the variable intake system inside the intake manifold, etc. Each combustion pressure imbalance between cylinders is detected as misfire, not only just the plugs and coils. Since the car is a 08, you should have still warranty, make an appointment with your dealer and let them do the job.

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thanks for your reply ..

my car not have any more warenty coz i modifid it whith big air filter as the dealer say,,

we have a bad dealer in arab gulfe ,,

however by change the full injectar places we find the code in difrent cylendr ,,

so i have to replce the one whech is faulty ,,

and hop goen fin ,,

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thanks for your reply ..

my car not have any more warenty coz i modifid it whith big air filter as the dealer say,,

we have a bad dealer in arab gulfe ,,

however by change the full injectar places we find the code in difrent cylendr ,,

so i have to replce the one whech is faulty ,,

and hop goen fin ,,

Every forum has a member who has invalidated warranty by molesting his car!

Seriously dude, consider the fact you may be a bad owner, rather than your dealer being the problem?

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hi .thank you ,,

am not bad owner ,,thies is my 4th cayenne ,,

it has onley 3400km and still brand new

i replace the air filter in the delar work shop but they dident say its well cancel the weranty

in the first check up for the car the cancel it coz they dont wrait it car fail..

and also ask abaut owr daelar in UAE ,, ali and sons co.

thanks agine,

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