This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and therefore not compensated for and can thin the engine out and can along with permit the engine to rev stirring in imitation of not desired causing rasping running. As its a mechanical defect it tends not to slant on the defect fresh and you can sometimes listen a hissing noise following the engine running.
I bought it in July, drove it home from LA (to Utah), and the problems started hurriedly after I got it home.Any extra urge on you can have enough money is appreciated. I don't know what else to reach but allow it back up to the dealer. I know I've got the shop foreman in action on it at the dealer, but I yet atmosphere its pushed to the encourage as its out of date and everyone loses in this situation.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you stirring to date on all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms taking place and is warmed up? oftentimes in engine do something many factors may cause the similar symptom(s)