I took my car in to the dealer to replace the dash dimmer switch. The dealer said the service light was one (which I hadn't seen and was suprised by). They said they hooked up to the computer and the dme said that there had been some misfires, he then said that the oil was fouled with gas and had to be changed. He said that the car had probably flooded at some point, he also said they checked and cleaned the spark plugs. My question is, does this sound ok, what can cause the fouling, and is it anything to worry about. Any help is appreciated.