Emissions reduction Mazda 626 (3 and 4)

General information about the emission control system
To avoid pollution of the atmosphere by gaseous combustion products and gas condensate vapors, various exhaust gas toxicity reduction systems are installed on cars. The...

Electronic ignition system
The electronic ignition system, installed on all engines, is designed to control sparking in order to achieve optimal traction and reduce exhaust emissions. To control...

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

Air-fuel mixture lean system when the vehicle is in neutral gear
The idle air-fuel mixture lean valve is equipped on vehicles with a manual transmission. The valve is designed for additional air supply to the inlet pipe when the...

Forced crankcase ventilation system
Pic. 8.4. Scheme of the forced crankcase ventilation system: 1 - suction pipe; 2 - air filter; 3 - spool device; 4 – a cover of a head of the block of cylinders; 5 -...

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

A system for reducing toxicity when the throttle is abruptly closed
This system provides smooth closing of the throttle during heavy engine braking, as a result of which fuel that has not had time to burn does not enter the exhaust gases...

Economy Driving Display System
Some models with a manual transmission are equipped with an economy driving mode indicator. The instrument cluster has two indicator lamps, according to which the driver...

Fuel economy system (since 1984)
Pic. 14.29. Elements of the fuel economy system: 1 - headlight switch; 2 – a control lamp of necessity of inclusion of higher transfer; 3 - control lamp for excessive...

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

Air valves — removal and installation (since 1984)
Pic. 14.31. Removing air valves (1) RVT systems Turn out bolts of fastening of a pressure plate, disconnect vacuum hoses and remove valves from the air filter (pic....

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

Air nozzles — removal and installation (since 1984)
Pic. 14.33. PBT system air nozzle: 1 - air nozzle; 2 - tube; 3 - air nozzle fitting; 4 - gasket Loosen the nuts and remove the two air tubes (pic. 14.33). Unscrew the...

Three-way solenoid valve (since 1984)
Warm up the engine and leave it to idle. Connect a voltmeter between the contact «W» valves and «weight» car. Increase the engine speed, release the accelerator pedal...

Air injection system for 1986 and 1987 models
On engines with turbocharging and fuel injection, systems for reducing the toxicity of exhaust gases are installed, which, by the principle of operation and purpose, are...

Evaporative Emission System (EEC) (since 1986)
Pic. 15.54. Evaporative Emission System Schematic (EEC): 1 - throttle valve; 2 - from the water temperature valve; 3 - purge control valve No. 1; 4 - from the fuel tank;...

Crankcase ventilation (PCV) system (since 1986)
The forced crankcase ventilation system for engines with a fuel injection system is similar to the system described in Sect. 8 «Exhaust emission control 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....