Fuel injection (gasoline) car Mazda 121 (3)

Gasoline injection system — design description
EEC-V Engine Management System Schematic 1. EEC-V module; 2. Fuel pump; 3. Fuel pump relay; 4. Fuel filter; 3. Idle speed control valve; 6. Air flow meter; 7. Air...

Precautions when working with the electronic fuel injection system
The fuel system is under pressure. When opening the system, gasoline may spray out and should be collected with a rag. Wear safety glasses when working. Before loosening...

Instructions for checking the injection system
The pressure in the fuel system is released automatically, without unscrewing the fuel lines, when the engine has not been running for several hours. Before repairs,...

Operation of the gasoline injection system
Fuel is sucked from the fuel tank by an electric fuel pump and passes through a fuel filter located under the car to the injection unit. The pressure regulator ensures...

Sensors and actuators (executive mechanisms) of the injection system
The crankshaft position sensor is screwed into the cylinder block next to the oil filter. It tells the control unit the engine speed. The camshaft position sensor for...

Checking fuel injectors
Leaky injectors will cause difficulties when starting a hot engine, as well as a "dieseling" effect (engine operation after ignition is turned off), which causes engine...

Removal and installation injectors
The removal procedure is described for a 1.3 L engine. Instructions for 1.25/1.4 L engines are given at the end of the chapter. Removal Disconnect the negative cable...

Diagnostics of faults of the petrol injection system
Diagnostics of faults of the petrol injection system Before performing diagnostics of faults, it is necessary to fulfill the following prerequisites: exclude errors when...

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More sections on repairs of other Mazda models
• Model «B» engine: Power system (injector) Mazda Familia 5 (1985-1989)
• Power unit: Fuel injection (FE) Mazda Capella 4 (1987-1992)

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