Mazda 323/626/929/GLC/MX-6/RX-7 1978-1989

EMISSION CONTROLS

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There are three types of automotive pollutants: crankcase fumes, exhaust gases and gasoline evaporation. The pollutants formed from these substances fall into three categories: unburned hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx). The devices used to limit the release of these pollutants into the atmosphere are commonly referred to as emission control equipment.

 
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