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) 1.4l engines - Bosch 1.8l and 2.0l engines - Siemens Fuel tank Capacity 55 l Fuel filter High...

Troubleshooting
When troubleshooting an engine, start with a performance check and inspection of major systems. If the engine is malfunctioning, erratic idle speed, or insufficient...

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

Fuel pump check
Order of execution 1. Turn off the ignition. 2. With additional wires, apply voltage to the fuel pump connector and check if the pump works or does not work. Attention!...

Fuel filter replacement
Order of execution 1. Relieve 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...

Replacing the overflow limiter (two-way valve)
Order of execution 1. Disconnect the fuel vapor hoses and remove the overflow limiter. 2. Considering the direction of flow, set the overflow limiter.

Fuel level sensor replacement
Order of execution 1. Remove the cap from the fuel filler neck of the fuel tank to equalize the pressure in the tank with atmospheric pressure. 2. Turn out screws and...

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

Malfunction Indicator Lamp (MIL)
With on-board diagnostics (OBD) The MIL warning lamp lights up when there are malfunctions in the engine management system. However, the MIL will not come on after three...

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

Fuel system sensors
Manifold absolute pressure sensor (IDA) The location of the elements of the fuel system in a car with engines of 1.6 liters and 1.8 / 2.0 liters 1 - absolute pressure...

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

Engine Idling Crankshaft Speed Control Modulator (ISC)
The engine idle speed control modulator is made with two coils, which are controlled by separate master stages of the engine control unit. Depending on the pulse applied...

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

Knock sensor (KS)
The knock sensor mounted on the cylinder block responds to high-frequency oscillations of the cylinder block and converts them into electrical signals, the magnitude of...

Ignition switch (ST) and range switch (TR) in vehicles with automatic transmission
When the ignition key is turned to the START position, battery voltage is applied 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 key in the ignition switch to the START position, battery voltage is supplied to the engine control unit. Based on this signal, the ECM controls the...

The engine control unit
Check the reliability of the connection of the corresponding pins of the connector of the control unit with «weight».

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

Electromagnetic valve for cleaning the fuel Vapor Capture System canister (EVAP)
The Evaporative Emission System prevents fuel vapors from escaping into the atmosphere from the fuel tank, thereby preventing the formation of photochemical smog. Fuel...

MFI main relay
When the ignition is switched on, battery voltage is supplied to the engine control unit, fuel injectors, air flow meter, etc., while voltage is also applied to the main...

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 type 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 illegal misfiring. Examination Use a...

Oil valve (OCV)
The mechanism for changing the moment of opening and closing valves (CVVT) installed on the intake camshaft and helps to reduce emissions of harmful substances from...

Fuel line and injectors
1.6L engine Engines 1.8/2.0 L Withdrawal 1. Before disconnecting the fuel lines, depressurize the fuel system, otherwise pressurized fuel will flow rapidly from the fuel...

Throttle assembly
Withdrawal Warning! The throttle body must not be removed Remove the throttle position sensor. Attention! Remove the throttle position sensor only to replace it....

Fuel tank — removal and installation
Withdrawal Gasoline is explosive, so when working with fuel system components, ensure that the workplace is well ventilated, do not use fire, sparking devices, open...

Accelerator pedal and cable
Withdrawal 1. Remove the sleeve and tip of the inner part of the cable from the accelerator pedal lever. 2. Disconnect the connector from the accelerator pedal switch,...