Shop for New Auto Parts at 1AAuto.com http://1aau.to/c/77/az/air-flow-meter Does the gas mileage in your car or truck seem to be getting worse? Check your mass airflow sensor and these other air intake parts to make sure your engine is running as efficiently as possible! In this video, Andy shows you the key parts of the air intake system, how they can fail, and what you can do about it! The mass airflow sensor measures the volume of air entering your car or truck's engine. If airflow is reduced from a dirty air filter, if air measurement is incorrect or flaky from a bad sensor, if a throttle body sticks, if an intake plenum is leaking, your engine might be wasting fuel to compensate!