Engine Emissions Management — General Information Illustrations and diagrams of vacuum emission control are found at the end of this chapter. They should be consulted before starting installation or testing. Wiring diagrams are located at the end chapter 6 . There are...
Positive crankcase ventilation (PCV) Action The closed crankcase ventilation system is used on all HONDA vehicles. This system returns unburned fuel (those. leaking through the piston rings) into the intake manifold for combustion along with the air/fuel...
Gasoline vapor recovery system Action This system prevents gasoline vapors from leaking into the atmosphere from the gas tank and carburetor. The device of the system is different for different models of production of different years, and also...
Exhaust Gas Recirculation (EGR) System The EGR system is designed to control nitrogen oxide emissions by recirculating a portion of the exhaust gases to the intake manifold through an 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 02 in the exhaust gas. If the ratio in the fuel mixture is not ideal, for example, it is poorer (those. too...