How do I Clean a Butterfly Valve on a 2003 Toyota Prius?
Cleaning the butterfly valve is an important part of the car maintenance. The valve feeds air into the intake chamber when the throttle is opened. The harder you press the gas petal, the more the butterfly valve opens. After years of use the valve can become clogged by dirt and grime, decreasing mileage and performance. It is recommended to clean the butterfly valve every 30,000 miles or so.
