Recently my '08 G6 GT has been having some problems.. When I take off, the RPM's stay stuck on 2 and don't change for about 1 minute and when it finally changes the car starts stuttering like if it wants to turn off and its been wasting gas like crazy. I took it to Pontiac and they checked the transmission and the updates and said everything was fine so idk what else it could be.. I was reading other people's posts and I was thinking maybe it could be the fuel injectors or maybe I have to change the transmission oil. Can someone help me?