THe other night on my way home from work I plowed through a puddle not knwoing i was there bescause it was pouring outsdie. I'm afraid maybe the water got into my motor because I don't have a bypas valve for my intake. Now my motor sputters and my exahust sounds like a friggin' harely when I accelerate but when I downshift it sounds normal. I thought maybe it was do the nitrous but there's no knocking of any kind and the car is still running fine despite the sputtering. Any suggestions on what to do ? Thanks.