Kia Forte: Description

Exhaust emissions (CO, HC, NOx) are controlled by a combination of engine modifications and the addition of special control components.

Modifications to the combustion chamber, intake manifold, camshaft and ignition system form the basic control system.

These items have been integrated into a highly effective system which controls exhaust emissions while maintaining good drivability and fuel economy.

Air/Fuel Mixture Control System [Multiport Fuel Injection (MFI) System]

The MFI system uses signals from the heated oxygen sensor to activate and control the injector installed in the manifold for each cylinder, thus precisely regulating the air/fuel mixture ratio and reducing emissions.

This in turn allows the engine to produce exhaust gas of the proper composition to permit the use of a three way catalyst. The three way catalyst is designed to convert the three pollutants [hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx)] into harmless substances. There are two operating modes in the MFI system.

Exhaust Emission Control System

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Catalytic Converter Description

The catalytic converter of the gasoline engine is a three way catalyst. It oxidizes carbon monoxide and hydrocarbons (HC), and separates oxygen from the oxides of nitrogen (NOx). [SULEV] ...

See also:

Crankshaft Position Sensor (CKPS) Removal
1. Turn the ignition switch OFF and disconnect the battery negative (-) cable. 2. Disconnect the crankshaft position sensor connector (A) ...

Crankshaft Position Sensor (CKPS) Description
Crankshaft Position Sensor (CKPS) detects the crankshaft position and is one of the most important sensors of the engine control system. If there is no CKPS signal input, the engine may stop ...

Center Pillar Trim Component Location
(4Door, 5Door) 1. Center pillar lower trim 2. Center pillar upper trim (2Door) 1. Rear inner outer trim 2. Center pillar upper ...