Emissions reduction Mazda 626 (3 and 4)

General information about the exhaust gas toxicity reduction system
To prevent atmospheric pollution from combustion gases and gas condensate fumes, vehicles are equipped with various exhaust gas toxicity reduction systems. The...

Electronic ignition system
The electronic ignition system, installed on all engines, is designed to control spark formation in order to achieve optimal traction qualities and reduce exhaust...

Air injection system
The air injection system helps reduce the content of hydrocarbons and carbon monoxide in the exhaust gases by injecting air into the exhaust pipes of each cylinder. In...

Lean fuel mixture control system when the vehicle is in neutral gear
Vehicles with a manual transmission are equipped with an idle air-fuel mixture lean valve. The valve is designed to supply additional air to the inlet pipe when the...

Forced crankcase ventilation system
Figure 8.4. Diagram of the forced crankcase ventilation system: 1 – suction pipe; 2 – air filter; 3 – spool valve; 4 – cylinder head cover; 5 – fresh air; 6 – crankcase...

Automatic intake air temperature control system
The automatic air temperature control system is designed to improve engine efficiency and reduce hydrocarbon content in exhaust gases during the warm-up period by...

System for reducing toxicity when the throttle is abruptly closed
This system ensures smooth closing of the throttle valve during sudden engine braking, as a result of which unburned fuel does not enter the exhaust gases and does not...

Fuel economy indicator system
Some models with a manual transmission are equipped with an economy driving mode indicator system. The instrument cluster has two warning lights, which the driver uses...

Fuel economy system (since 1984)
Figure 14.29. Elements of the fuel economy system: 1 – headlight switch; 2 – indicator lamp for the need to engage a higher gear; 3 – Excessive throttle opening...

Air injection system (since 1984)
Figure 14.30. Air injection system of the RVT system: 1 – air nozzles; 2 – air supply valves; 3 – three-way electromagnetic valve; 4 – control unit of the RVT system The...

Air valves — removal and installation (since 1984)
Figure 14.31. Removing the air valves (1) of the RVT system Remove the pressure plate mounting bolts, disconnect the vacuum hoses and remove the valves from the air...

Reed valves — removal and installation (since 1984)
Start the engine and warm it up to normal operating temperature. Remove the air valves. Start the engine, then increase and decrease the crankshaft speed several times;...

Air injectors — removal and installation (since 1984)
Figure 14.33. Air nozzle of the RVT system: 1 – air nozzle; 2 – tube; 3 – air nozzle nipple; 4 – gasket Loosen the nuts and remove the two air tubes (figure 14.33)....

Three-way solenoid valve (since 1984)
Warm up the engine and let it idle. Connect a voltmeter between the valve terminal "W" and the vehicle ground. Increase the engine speed, release the accelerator pedal...

Air injection system for 1986 and 1987 models
Turbocharged and fuel-injected engines are equipped with exhaust gas toxicity reduction systems, which, in principle of operation and purpose, are similar to those...

Evaporative Emission Control (EEC) system (since 1986)
Figure 15.54. Schematic diagram of the fuel vapor recovery (EEC) system: 1 – throttle valve; 2 – from the water temperature valve; 3 – purge control valve No. 1; 4 –...

Crankcase ventilation (PCV) system (since 1986)
The forced crankcase ventilation system of engines with a fuel injection system is similar to the system described in section. 8 "Exhaust Gas Toxicity Reduction System"....

Exhaust gas recirculation system (since 1986)
The exhaust gas recirculation system is designed to reduce the content of nitrogen oxides in the exhaust gases by directing part of the gases into the intake manifold....

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Capella 5 (1991-1997)