Hi guys. Could use some help on an issue having on our 2013 Cayenne S.
During acceleration, when it gets to ~2000 rpms, regardless of gear, the car struggles to deliver powers. The car stutters like I'm driving over a rumble strip under acceleration, and I can see it struggle to build rev. Not too bad when it's cold out or when the car is just warming up, but once it's hot out (like recently) or car is all warmed up, the problem becomes very noticeable. Even the passengers can feel it. So this problem is temperature dependent. My mileage also gone to shit (average >17L/100km). Otherwise it idles fine, no rev bouncing.
The problem is the engine isn't throwing a code, so the shops have no idea how to diagnose. So far I've tried replacing all the plugs and coils, cycling through couple bottles of fuel injector cleaners, and new oil filters. No luck.
Any guesses what it could be?
or any recommendations on a Porsche specialist shop that I should go visit.