Air Filters and Water in Fuel
I took my 2005 Chevy Malibu to Pep Boys for service after running the car into high water during a flood. not much damage was done to the interior of the car but the engine had issues with water damage. Their service department used patients in diagnosing the problems with the air filter taking in water, and the did everything they could to salvage the working parts and flushed the gas tank to insure future problems didnt occur. the car still runs like a top.