Hyundai Accent

Repair and car operation

Malfunctions of MFI system are often caused by bad contacts in sockets of a plait of wires. Therefore check reliability of connection of all sockets.



Before check of frequency of rotation of idling be convinced that spark plugs, fuel nozzles, the modulator of frequency of rotation of idling (ISC), a compression etc. are in an order.

Check conditions

Hyundai Accent
+ 1. Maintenance instruction
+ 2. Engine
+ 3. Greasing system
+ 4. Cooling system
+ 5. Control, decrease in toxicity
- 6. Fuel system
   6.1. Specifications (SOHC and DOHC)
   6.2. Check of the fuel pump
   6.3. Check of the pressure created by the fuel pump
   6.4. Checks of system of injection of MFI
   6.5. Control lamp of malfunctions (MIL)
   6.6. Diagnostic codes of malfunctions of "OBD-II"
   6.7. Diagnostic codes of malfunctions, except «OBD-II»
   6.8. Replacement of the fuel filter
   6.9. Replacement of the limiter of overflow (the double-thread valve)
   6.10. Fuel level sensor replacement
   6.11. Control system of the MFI engine
   6.12. Fuel nozzles
   6.13. Throttle knot
   6.14. A power supply system with the carburetor
   6.15. Check of frequency of rotation of idling
   6.16. Adjustment of frequency of rotation of idling
   6.17. Frequency of rotation of idling and adjustment of a fuel mix
   6.18. Check and adjustment of the starting arrangement
   6.19. Check and adjustment of a free wheeling of a cable of an accelerator
   6.20. Fuel tank
   6.21. Catching canister паров fuels
   6.22. Replacement of the fuel filter
   6.23. Carburetor
   6.24. Cable and accelerator pedal
   6.25. Search and elimination of malfunctions of fuel system with the carburetor
+ 7. Ignition system
+ 8. Coupling
+ 9. Transmission
+ 10. Axes and power shafts
+ 11. Suspension bracket
+ 12. Steering
+ 13. Brake system
+ 14. Body
+ 15. Central air
+ 16. Electric equipment
+ 17. Appendix
+ 18. Electroschemes

6. Fuel system


By search of malfunctions of the engine begin with check of working capacity and survey of the main systems. If operation of the engine, unstable frequency of rotation of a cranked shaft idling or insufficient acceleration is broken, check the following main systems:

1. Electric food:

– battery;
– a burned-through crossing point;
– fuse.

2. Connections with "weight"

Supply of fuel:

– топливопровод;
– fuel filter;
– fuel pump.

Ignition system:

– spark plug;
– high-voltage wires;
– ignition coil.
5. System of decrease in toxicity of the fulfilled gases:

– system of ventilation of a case;
– vacuum leak.
6. Others:

– installation of a corner of an advancing of ignition;
– frequency of rotation of idling.
1. The engine should be heated-up to temperature of cooling liquid 80-95°C.
2. Headlights, dimensional lighting, the fan of a radiator and all consumers of electric energy should be switched off.
3. The transmission should be established in neutral situation.
4. The steering wheel should be established for movement directly forward.


1. Connect a tachometer to primary winding of the coil of ignition or the scanner to the diagnostic socket.
2. Start up the engine and leave it to work at frequency of rotation of a cranked shaft idling.
3. No more, than on 5 with increase frequency of rotation of a cranked shaft to 2000-3000min-1 then let's to it work idling within 2 minutes.
4. By a tachometer determine frequency of rotation of idling.