Gasoline engine fuel system Hyundai Elantra 3

Technical data of the fuel system of gasoline engines
Technical data Name Technical requirements Engine Management System (ECM) 1.4 l engines – Bosch 1.8 and 2.0 l engines – Siemens Fuel tank Capacity 55 l Fuel filter High...

Troubleshooting issues
When troubleshooting an engine, start by checking the operation and inspecting the main systems. If the engine is running poorly, has erratic idle speed or poor...

Checking the idle speed
Caution: Before checking the idle speed, make sure the spark plugs, fuel injectors, idle speed modulator (ISC), compression, etc. are in order. Verification conditions...

Checking the fuel pump
Procedure 1. Turn off the ignition. 2. Using additional wires, apply voltage to the fuel pump connector and check whether the pump works or not. Caution: To hear the...

Replacing the fuel filter
Procedure 1. Relieve the pressure in the fuel system as follows. open the trunk and disconnect the connector from the fuel pump; start the engine and let it run until it...

Replacing the overflow limiter (two-way valve)
Procedure 1. Disconnect the fuel vapor discharge hoses and remove the overflow limiter. 2. Considering the flow direction, install the overflow limiter.

Replacing the fuel level sensor
Procedure 1. Remove the fuel filler cap from the fuel tank to equalize the pressure in the tank with atmospheric pressure. 2. Remove the screws and remove the fuel level...

MFI injection system checks
If the components of the MFI system (sensors, ECM, injectors, etc.) fail, the fuel supply to the engine cylinders is disrupted in various operating modes, which leads to...

Malfunction Indicator Lamp (MIL)
With on-board diagnostics (OBD) system The MIL indicator lamp comes on when there is a malfunction in the engine management system. However, the MIL will not illuminate...

Diagnostic Trouble Codes
Diagnostic Trouble Codes (1.6L I4) With on-board diagnostics (OBD) system Code Malfunction P0105 Damage to the electrical circuit of the air flow meter sensor P0112 Low...

Fuel system sensors
Manifold Absolute Pressure (MAP) Sensor Location of fuel system components in a vehicle with 1.6 l and 1.8/2.0 l engines 1 - manifold absolute pressure sensor (MAP); 2 -...

Fuel injectors
Fuel injectors inject fuel into the engine cylinders based on signals from the ECM. The amount of fuel supplied depends on the opening time of the injectors, i.e. on the...

Idle Speed Control (ISC) Modulator
The modulator for controlling the engine idle speed is made with two coils, which are controlled by separate master cascades of the engine control unit. Depending on the...

Vehicle Speed Sensor (VSS)
The vehicle speed sensor is a reed switch built into the speedometer. The sensor converts the rotation frequency of the gear in the final drive into a pulse signal,...

Knock Sensor (KS)
The knock sensor installed on the cylinder block reacts to high-frequency vibrations of the cylinder block and converts them into electrical signals, the value of which...

Ignition switch (ST) and range selector (TR) in vehicles with automatic transmission
After turning the ignition key to the START position, battery voltage is supplied to the range switch (TR) and from it to the engine control unit. If the selector lever...

Ignition switch (ST) in vehicles with manual transmission
After turning the ignition key to the START position, battery voltage is supplied to the engine control unit. Based on this signal, the ECM controls the fuel injection...

Engine control unit
Check the reliability of the connection of the corresponding contacts of the control unit connector to the ground.

Air Conditioning Switch and Relay
The air conditioning switch supplies battery voltage to the engine control module (ECM) when the air conditioning system is turned on. In this case, the ECM controls the...

Fuel Vapor Capture System (EVAP)Canister Cleaning Solenoid Valve
The fuel vapor recovery system prevents fuel vapor from evaporating into the atmosphere from the fuel tank, thereby preventing the formation of photochemical smog. Fuel...

MFI Main Relay
When the ignition is turned on, the battery voltage is supplied to the engine control unit, fuel injectors, air flow meter, etc., and voltage is also supplied to the...

Ignition coil
The engine control unit supplies voltage to the ignition switch and when the current in the primary winding of the ignition coil is interrupted, a high voltage current...

Fuel pump
The submersible fuel pump is located in the fuel tank.

APS acceleration sensor
The acceleration sensor is used to roughly determine road conditions. The sensor signal is used by the engine control unit to detect abnormal misfires. Examination Use a...

Oil change valve (OCV)
The variable valve timing (CVVT) mechanism is installed on the intake camshaft and helps reduce emissions of harmful substances with exhaust gases and reduces fuel...

Fuel line and injectors
Engine 1.6 l Engines 1.8/2.0 l Removal 1. Before disconnecting the fuel lines, relieve the pressure in the fuel system, otherwise, fuel under pressure will leak out of...

Throttle assembly
Removal Warning! The throttle valve must not be removed Remove the throttle position sensor. Caution! Remove the throttle position sensor only for replacement....

Fuel tank — removal and installation
Removal Gasoline is explosive, so when working with fuel system components, ensure proper ventilation of the workplace, do not use fire, sparking devices, open...

Accelerator pedal and cable
Removal 1. Remove the bushing and the end of the inner cable from the accelerator pedal lever. 2. Disconnect the connector from the accelerator pedal switch, remove the...

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Elantra 3 (2000-2006)