Vehicle fuel system Mazda 3 (BK)

General information about the fuel system
Mazda 3 cars (GG) equipped with the new L series motors. Features of the L series motors are shown below: Pic. 2.53. Mazda 3 Fuel System Diagram: 1 - PCM block; 2 -...

Intake system — description
Functions, design and operation of the Mazda 3 intake system (GG) with L3, LF and L8 engines same as current 323 FS engine (BJ), except for the following: to improve...

Key Features of Variable Air Duct (VAD) (L3)
Pic. 2.57. Mazda 3 VAD system with L3 engine: 1 - damper of the VAD system; 2 - control solenoid valve of the VAD system; 3 – vacuum chamber of the VAD system; 4 - check...

System Actuator (VAD) (L3) — Description
Pic. 2.58. Actuator of the VAD system: 1 - damper is open; 2 - damper closed; 3 – damper actuator of the VAD system; 4 - rod; 5 - damper of the VAD system; 6 - intake...

System Solenoid Valve (VAD) (L3) — Description
Pic. 2.59. VAD system solenoid valve: 1 - power on; 2 – power off; 3 - channel A (to the atmosphere); 4 - channel B (to the actuator); 5 - channel C (to intake...

System Check Valve (VAD) (L3) — Description
Pic. 2.60. VAD check valve: 1 - check valve; 2 - green; 3 - white; 4 - intake manifold; 5 - vacuum chamber of the VAD system check valve (unidirectional) maintains a...

Fuel node — description
Pic. 2.61. Fuel unit of the car Mazda 3: 1 - fuel tank; 2 - check valve; 3 - block of the fuel pump; 4 - fuel injector; 5 – pulsation damper; 6 - fuel pump relay; 7 -...

Fuel Pump Assembly — Description
Pic. 2.62. Fuel pump: 1 - block of the fuel pump; 2 - fuel gauge sensor Due to the fact that the vehicle uses a system without fuel return to the tank, the fuel pump...

Fuel System Components and Exhaust System
Pic. 2.218. Fuel system and exhaust system components: 1 - air filter cover; 2 - filter element of the air filter; 3 - air filter housing; 4 - resonant chamber; 5 -...

Fuel Leak Check
Disconnect the negative battery cable. Remove the fuel injectors together with the fuel distributor without disconnecting the fuel supply hose. Pic. 2.219. Fuel...

Performance check
Note. If you don't have a special fuel injector tester, run « Fuel leak test », to check if the fuel injector is working. Disconnect the negative battery cable. Remove...

Spray jet test
Pic. 2.222. Normal and not normal fuel injector spray Check the spray pattern of each fuel injector. If the atomization is not correct, replace the fuel injector (pic....

Removal and installation of the intake system (diesel)
Attention! The PCM is built into the air filter cover. Attention! Applying excessive force to the cover may damage the PCM. Attention! Be careful not to touch the PCM...

Removal and installation of the regulator of idling (diesel)
Pic. 2.315. idle speed controller Removing Remove the bottom cover. Remove the battery cover. Disconnect the negative cable from the battery. Remove the idle air control...

Removal and installation of a pedal of management of giving of fuel (diesel)
Pic. 2.316. Accelerator pedal: 1 – a pedal of management of giving of fuel; 2 - throttle cable Removing Remove the fuel control pedal. Disconnect the throttle cable....

Checking and adjusting the throttle cable (diesel)
Make sure the throttle valve closes completely. Pic. 2.317. Throttle cable adjustment Move the throttle cable in directions A and B, and check that the clearance of the...

Removal and installation of the block of the fuel pump (diesel)
Pic. 2.321. Fuel pump: 1 - quick connector; 2 – a cover of the fuel pump; 3 - fuel pump block Removing Disconnect the negative cable from the battery. Remove the fuel...

Checking fuel leakage after installing the pump unit (diesel)
Before installing the fuel tank, check that there is no fuel leakage when pressurizing the fuel tank to +5.9 kPa. Install the fuel tank. Set the car in motion and brake...

Removal and installation of a fuel nozzle (diesel)
Removing Remove the battery cover. Disconnect the negative cable from the battery. Remove the air filter. Disconnect the fuel injector connector. Remove the quick...

Intake System Components (Diesel)
Pic. 2.308. Components of the intake system of a car with a Z6 engine: 1 - air filter; 2 – the electromagnetic valve of a regulator of idling; 3 - the actuator of the...