Honda Civic/CRX/del Sol 1984-1995 Repair Guide

EXHAUST EMISSIONS

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

 
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