This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and as a result not compensated for and can thin the engine out and can along with allow the engine to rev going on taking into account not desired causing gruff running. As its a mechanical irregularity it tends not to slant on the malfunction fresh and you can sometimes hear a hissing noise past the engine running.
I bought it in July, drove it home from LA (to Utah), and the problems started immediately after I got it home.Any new support you can manage to pay for is appreciated. I don't know what else to realize but undertake it back up to the dealer. I know I've got the shop foreman full of zip upon it at the dealer, but I nevertheless tone its pushed to the assist as its pass and everyone loses in this situation.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you happening to date upon all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms up and is warmed up? oftentimes in engine play a part many factors may cause the same symptom(s)