When I step on the gas and try to take the rpms up to 2000 the engine acts like it is going to dye out but it doesn't it just jerks and won’t go any higher. the car still drives and changes gears I just have to coast it up to that speed I have gotten it up to 55mph it just take a long time. Few people here in town say that it could be the fuel system acting up so I was going to change the fuel filter and use fuel injection cleaner. When I called Nissan about the problem they talked to me like I was ignorant so I hung up in his face then called back and told him that I have been screwed too many times by the dealerships.