Chrysler RAM50/D50/Arrow 1979-1993 Repair Guide

AUTOMOTIVE EMISSIONS

Print

Before emission controls were mandated on internal combustion engines, other sources of engine pollutants were discovered along with the exhaust emissions. It was determined that engine combustion exhaust produced approximately 60 percent of the total emission pollutants, fuel evaporation from the fuel tank and carburetor vents produced 20 percent, with the final 20 percent being produced through the crankcase as a byproduct of the combustion process.

 
label.common.footer.alt.autozoneLogo