How car heating and ventilation systems work | How a Car Works The incoming air can be heated by the engine to keep the windows clear of mist and the car interior at a chosen temperature. Air flow Air enters a large duct at the front of the car, placed so that when the car is moving the entry point is in a high-pressure area and air is forced in. Understanding a car air intake system A modern car air intake system has three main parts - the air filter, mass flow sensor and throttle body. Located directly behind the front grille, the air intake system draws air through a long plastic tube going into the air filter housing, which will be mixed with the car fuel. Mass Air flow Sensor (MAF): how it works, symptoms A Mass Air Flow sensor (MAF) is one of the key components of an electronic fuel injection system in your car. It is installed between the air filter and the intake manifold of the engine. See the diagram. The mass air flow sensor measures the amount of air entering the engine or the air flow. Bad Mass Air Flow Sensor? (7 Symptoms with Fixes) - The A bad mass air flow sensor is often the likely culprit if your car isn't running as it should. It's job is to keep track of the amount of air coming in through the air filter, so that the ECU can adjust the amount of fuel getting into the engine. If the mass air flow sensor Read more Bad Mass Air Flow Sensor? (7 Symptoms with Fixes) coolant flow radiator and engine block - Car Repair in PDF fileCoolant Flow Radiator And Engine Block Below is an explanation of this system's operation The Thermostat Just like your body needs to warm up when you begin to exercise, your car's engine needs to warm up when it starts its exercise. The thermostat provides control for your engine's warm-up period.