General Information

Crankcase Emission Control System
The crankcase emission control system prevents blow-by gases from escaping into the atmosphere.

The blow-by gases in the crankcase are routed, through various components, back into the intake manifold for combustion.

Evaporative Emission Control System
It consists of various components, which collect and lead the fuel vapors to the intake manifold for combustion.

The evaporative control system prevents the escape of fuel vapors from the fuel tank and fuel injection into the atmosphere.

Exhaust Emission Control System
The exhaust emission control system consists of 3, three-way catalytic converters and an exhaust gas recirculation (EGR) system.

The catalytic converters are located one on each exhaust bank, near the exhaust manifold, and one under the car.

The three-way catalytic converters reduce the emission of Hydrocarbons (HC), Carbon Monoxide (CO) and Oxides of Nitrogen (NOx).

The Exhaust Gas Recirculation (EGR) system reduces Oxides of Nitrogen (NOx), by reducing peak combustion temperatures through the addition of exhaust gas into the intake air stream.

Electronic Control System (see Computers And Control Systems)
The electronic control system consists of the Electronic Control Module (ECM), and various sensors and output devices.

This system controls engine operation (i.e. A/F mixture and ignition timing) to reduce pollutants while maintaining optimum driveability and reducing fuel consumption.