Vehicle fuel system Hyundai Accent 2

Technical data (SOHC and DOHC)
MFI injection system Name Technical requirements Fuel tank 45 l Fuel filter High pressure Fuel pump Electric, mounted in the fuel tank Throttle position sensor...

Checking the fuel pump
Execution order 1. Turn off the ignition. 2. Using additional wires, apply voltage to the fuel pump connector and check whether the pump is working or not. Warning: To...

Checking the pressure generated by the fuel pump
Execution order 1. Remove the rear seat cushion and remove the fuel pump inspection panel. 2. To relieve pressure in the fuel system, disconnect the fuel pump connector,...

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

Malfunction Indicator Lamp (MIL)
The MIL indicator lamp lights up when there are malfunctions in the engine management system. However, the MIL lamp will not light up after three engine starts if the...

OBD-II Diagnostic Trouble Codes
Code Malfunction P0102 Low air flow meter signal level P0103 Air Flow Meter Signal High P0112 Low air temperature signal P0113 High air temperature sensor signal level...

Diagnostic trouble codes other than «OBD-II»
Code Malfunction P0105 Damage to the electrical circuit of the air flow meter sensor P0112 Low air temperature sensor signal level P0113 High air temperature sensor...

Replacing the fuel filter
Execution order 1. Remove the rear seat cushion and remove the fuel pump inspection panel. To relieve pressure in the fuel system, disconnect the fuel pump connector,...

Replacing the overflow limiter (two-way valve)
Execution order 1. Disconnect the fuel vapor bleed hoses and remove the overflow limiter. 2. Considering the direction of flow, install an overflow limiter.

Replacing the fuel level sensor
Execution order 1. Remove the fuel filler cap from the fuel tank to equalize the pressure in the tank with atmospheric pressure. 2. Remove the fuel filler cap from the...

MFI engine management system
Placement of MFI control system elements 1 – air flow meter "OBD"; 2 – engine inlet air temperature sensor; 3 – air flow meter, except "OBD"; 4 – air-fuel ratio sensor,...

Fuel injectors
Elements of the fuel supply system 1 – intake manifold; 2 – bolt, 15–20 Nm; 3 – throttle assembly; 4 – bolt, 15–20 Nm; 5 – throttle assembly gasket; 6 – fuel line; 7 –...

Throttle assembly
1 – screw (not adjustable); 2 – switch, only on cars with automatic transmission; 3 – throttle assembly; 4 – bolt, 15–20 Nm; 5 – gasket; 6 – air chamber. Removal...

Fuel system with carburetor
Placement of elements of the fuel supply system with a carburetor 1 – air flow meter "OBD"; 2 – engine inlet air temperature sensor; 3 – air flow meter, except "OBD"; 4...

Checking the idle speed
Verification conditions The headlights, electric radiator fan and all electrical consumers must be switched off and the transmission must be in neutral. Execution order...

Adjusting the idle speed
Adjustment conditions The headlights, electric radiator fan and all electrical consumers must be switched off and the transmission must be in neutral. Execution order 1....

Idle speed and fuel mixture adjustment
Execution order 1. Remove the carburetor. 2. Secure the carburetor in a vice with the jaws covered with soft material, leaving access to the mixture adjustment screw...

Checking and adjusting the starting device
Verification conditions The coolant temperature should be 80-95°C. Headlights, electric radiator fan and all electrical consumers must be turned off. The gearbox must be...

Checking and adjusting the free play of the accelerator cable
Execution order 1. Start the engine and let it run at idle speed. 2. Check that the accelerator cable does not have any free play. 3. If the accelerator cable has free...

Fuel tank — removal and installation
1 – bracket; 2 – fuel shut-off valve; 3 – fuel shut-off valve cover; 4 – lid; 5 – upper pressure hose; 6 – threaded cap; 7 – fuel pump; 8 – fuel filler cap; 9 – two-way...

Fuel vapor recovery canister
1 – canister; 2 – canister holder; 3 – fuel filter bracket; 4 – fuel filter; 5 – fuel return hose; 6 – fuel return pipe. Removal and installation 1. The pipes must be...

Carburetor — removal and installation
1 – accelerator pump; 2 – auxiliary accelerator pump; 3 – vacuum chamber; 4 – starting device; 5 – vacuum pipe; 6 – vacuum pipe of the ignition distributor; 7 –...

Accelerator cable and pedal
1 – cotter pin; 2 – accelerator cable; 3 – bracket; 4 – connector of accelerator switch for cars with automatic transmission; 5 – bolt, 8–12 Nm; 6 – return spring; 7 –...

Troubleshooting a Carburetor Fuel System
Sign Probable cause Method of elimination Unstable engine operation Fuel mixture too lean or rich Repair or replace the carburetor Fuel leaks from the retardation device...

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