Vehicle engine emission control Honda Accord 3

Engine Emissions Management — General Information
Illustrations and diagrams of the vacuum emission control are located at the end of this chapter. They should be referred to before beginning installation or testing. Electrical diagrams are located at the end of the...

Positive Crankcase Ventilation (PCV) System
Action A closed crankcase ventilation system is used on all HONDA vehicles. This system returns unburned fuel (i.e., fuel that has leaked past the piston rings) to the intake manifold for combustion along with the...

Gasoline vapor recovery system
Action This system prevents gasoline vapors from escaping into the atmosphere from the gas tank and carburetor. The design of the system varies among models of different years of production, and also depends on the...

Exhaust Gas Recirculation System (EGR System)
The EGR system is designed to control nitrogen oxide emissions by recirculating a portion of the exhaust gases into the intake manifold through the EGR valve located on the intake manifold. On carburetor vehicles, the...

Oxygen sensor — removal and installation
Action The oxygen sensor is installed on the exhaust manifold. It is used to determine the concentration of O2 in the exhaust gas. If the ratio in the fuel mixture is different from the ideal, for example, it is leaner...