so i was on the highway and i hit a raccoon and it EFFED up the under carriage of my LS. so i had to have my radiator and condenser replaced. i took it to a family friend who works on cars for a living and he replaced the radiator for me but not yet with the condenser/AC. now when i start my car, im not sure if its the engine or what but it makes his jolting sound and the car shakes a little bit. like little shakes. and when i start driving it and does a bit of jolting too. but not too much but it is noticeable. also the check engine light it on but it is NOT blinking or flashing. so i was wondering if someone could possible tell me whats wrong before i take it to get it read. oh by the way, its a 2004 LS V8 with about 80k miles, maybe 82k. any help is appreciated 