I think I broke something the other night but i dont know what. Friday night I drove downtown and the car was fine. I went to leave and I noticed that the engine had developed a terrible shudder in drive and there was no acceleration at all. When I first hit the gas the vibration gets real bad and the car barely wants to go. As the engine speed increases, it kinda smoothes out but it still isnt performing normally. Any suggestions of what it could be?