This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and consequently not compensated for and can thin the engine out and can afterward permit the engine to rev stirring subsequently not desired causing sharp running. As its a mechanical malfunction it tends not to perspective upon the idiosyncrasy open and you can sometimes listen a hissing noise considering the engine running.
I bought it in July, drove it house from LA (to Utah), and the problems started suddenly after I got it home.Any extra urge on you can present is appreciated. I don't know what else to attain but recognize it back up to the dealer. I know I've got the shop foreman enthusiastic on it at the dealer, but I nevertheless character its pushed to the back up as its outmoded and everyone loses in this situation.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place 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 stirring and is warmed up? oftentimes in engine doing many factors may cause the similar symptom(s)