Is your car stock other then what you have mentioned?
Also. Did you delete the TGV butterfly flaps and left the motors/bar in? Or did you remove the motors, bar and butterfly flaps. If you removed everything I would start of by cleaning the codes. They will put your car in a limp mode and could be causing you to start harder. Delete the codes first and let us know what you have done to the TGV's (everything you have done).
But remove the codes and report back, that's the main thing.