A climate control system and method for preventing exhaust odors from entering the passenger compartment of a motor vehicle. The climate control system includes a duct network and a damper system that is moveable between a fresh air mode and a recirculation air mode. The damper system being moved based at least in part upon a vehicle acceleration condition. During operation, the system is operated in the recirculation air mode during acceleration in a situation that probably has a high concentration of the exhaust odor and gases. The system operates in the fresh air mode when the situation is one that does not have a high probability of a high concentration of exhaust odors and gases.