Fuel injection (gasoline) car Mazda 121 (3)

Gasoline injection system — design description
Diagram of the EEC-V engine management system 1. EEC-V module; 2. Fuel pump; 3. Fuel pump relay; 4. Fuel filter; 3. Idle mode control valve; 6. Air flow meter; 7. Air...

Precautions when working on the electronic fuel injection system
The fuel system is under pressure. When the system is opened, gasoline may squirt out and must be collected with a rag. Wear protective goggles when working. Before...

Instructions for checking the injection system
The pressure in the fuel system is relieved by itself, without unscrewing the fuel lines, when the engine is not running for several hours. Before repairs, adjustments...

Operation of the petrol injection system
The fuel from the fuel tank is sucked in by the electric fuel pump and flows through the fuel filter located under the bottom of the vehicle to the injection unit. The...

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

Checking fuel injectors
Leaky injectors will lead to difficulties when starting a hot engine, as well as to the effect «dieseling» (engine operation after ignition off), which causes engine...

Removal and installation of nozzles
The removal operation is described for the 1.3L engine. Instructions for 1.25/1.4 l engines are given at the end of the chapter. Removing Disconnect the negative cable...

Diagnostics of malfunctions of system of injection of gasoline
Diagnostics of malfunctions of system of injection of gasoline The following prerequisites must be met before fault diagnosis is carried out: Eliminate errors when...