When I press the gas pedal to the floor to get on it. The engine stubbles on acceleration. Thought someone could give me some things to check out. Here is a exsample.. I went to lutz Friday, I went to step on it but the engine would kinda jerk back a little bit. It wouldnt hold back just jerk around alittle bit. It did it through Its fine on normal driving but when I step on it , it jerks. Can someone help me please.