Evaporative Emissions System: Operation: Notes

Gasoline vapor, evaporated from fuel in tank, is caught in reservoir tanks (station wagons) or in top portion of fuel tank (sedans & coupes) and is conducted into dirty side of air cleaner housing by way of air breather hoses. While engine is running, gases are drawn into intake manifold to be burned. When engine is stopped, gases remain on inner walls of air cleaner housing or element. When engine is started, gas which has condensed in air cleaner evaporates again and is drawn into engine and burned.