Faults 1-8
1. Cold engine does not start.
2. Cold engine starts and «stalls».
3. Hot engine does not start.
4. Difficulty starting a cold engine.
5. Difficulty starting a hot engine.
6. The engine runs erratically during warm-up.
7. Violation of the idle mode.
8. Engine starts and «stalls».
Fault No | Cause of malfunction | Elimination Method | |||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ||
X | X | No fuel in fuel tank | Pour fuel into the tank | ||||||
X | Faulty fuel pump | Check pump operation, replace if necessary | |||||||
X | X | X | X | X | X | X | X | Clogged fuel filter | Rinse the filter mesh or replace the filter |
X | X | X | X | X | Deformed or clogged drain pipe | Straighten or bleed the fuel line | |||
X | X | X | Increased fuel pressure | Check the operation of the pressure regulator, replace if necessary | |||||
X | X | X | X | X | X | Reduced fuel pressure in the system | Check the operation of the pressure regulator, replace if necessary | ||
X | X | X | X | X | Increased pilot pressure | Check operation of pilot pressure regulator, replace if necessary | |||
X | X | X | X | X | X | Reduced pilot pressure | Check operation of pilot pressure regulator, replace if necessary | ||
X | X | X | X | X | X | X | X | Leakage of injection nozzles | Replace nozzles |
X | Partially clogged injection nozzles | Replace nozzles | |||||||
X | X | X | Starter injector not working | Check the starter injector, wires and their connections | |||||
X | X | Leak start injector | Replace nozzle | ||||||
X | Faulty thermal time relay | Replace relay | |||||||
X | Faulty coolant temperature sensor | Check the wires and their connections, replace the sensor if necessary | |||||||
X | X | X | X | X | Throttle adjustment broken | Adjust throttle start position | |||
X | X | X | Auxiliary air valve not closing | Check valve, replace if necessary | |||||
X | X | Air inlet hood and/or air quantity meter leaking | Check intake system, replace if necessary | ||||||
X | X | X | X | Loose injection injectors | Tighten nozzles | ||||
X | Exhaust system leakage | Fix system leaks | |||||||
X | Faulty spark plugs | Replace spark plugs | |||||||
X | X | X | X | X | X | Faulty ignition coil | Replace ignition coil | ||
X | X | Faulty switch | Replace switch | ||||||
X | X | Break in the wires of the ignition system | Replace damaged wires | ||||||
Incorrect ignition timing | Replace switch | ||||||||
Damaged vacuum hoses | Replace damaged hoses | ||||||||
X | Faulty ignition timing controller | Replace ignition distributor | |||||||
X | X | X | X | X | X | Incorrect ignition timing | Adjust ignition timing | ||
X | X | X | X | X | X | X | X | Engine to be repaired | |
X | X | X | X | Use of low octane gasoline | Only use fuel with the required octane rating | ||||
X | X | X | X | Engine idle adjustment is broken | Adjust idle |
Faults 9-17
9. Backfires in the exhaust pipeline.
10. Engine runs rough when accelerating.
11. The engine runs intermittently at forced idle.
12. Interruptions in the operation of the engine in all modes.
13. The engine does not develop full power.
14. Increased fuel consumption.
15. Violation of the idle speed and CO content in the exhaust gases.
16. Knocking intake and exhaust valves during acceleration.
17. Increased content of hydrocarbons and nitrogen oxides in exhaust gases.
Fault No | Cause of malfunction | Elimination Method | ||||||||
9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | ||
No fuel in fuel tank | Pour fuel into the tank | |||||||||
Faulty fuel pump | Check pump operation, replace if necessary | |||||||||
X | X | X | X | X | Clogged fuel filter | Rinse the filter mesh or replace the filter | ||||
X | X | X | X | Deformed or clogged drain pipe | Straighten or bleed the fuel line | |||||
X | X | X | Increased fuel pressure | Check the operation of the pressure regulator, replace if necessary | ||||||
X | X | Reduced fuel pressure in the system | Check the operation of the pressure regulator, replace if necessary | |||||||
X | X | X | X | X | X | Increased pilot pressure | Check operation of pilot pressure regulator, replace if necessary | |||
X | X | X | X | X | X | Reduced pilot pressure | Check operation of pilot pressure regulator, replace if necessary | |||
X | X | X | X | X | X | X | X | Leakage of injection nozzles | Replace nozzles | |
X | X | X | X | X | X | Partially clogged injection nozzles | Replace nozzles | |||
X | X | X | X | X | X | Starter injector not working | Check the starter injector, wires and their connections | |||
X | Leak start injector | Replace nozzle | ||||||||
X | X | X | X | Faulty thermal time relay | Replace relay | |||||
Faulty coolant temperature sensor | Check the wires and their connections, replace the sensor if necessary | |||||||||
X | X | X | X | X | X | Throttle adjustment broken | Adjust throttle start position | |||
X | Auxiliary air valve not closing | Check valve, replace if necessary | ||||||||
X | X | X | X | Air inlet hood and/or air quantity meter leaking | Check intake system, replace if necessary | |||||
X | X | X | X | X | X | Loose injection injectors | Tighten nozzles | |||
X | X | X | X | Exhaust system leakage | Fix system leaks | |||||
X | X | X | X | Faulty spark plugs | Replace spark plugs | |||||
X | X | X | X | X | Faulty ignition coil | Replace ignition coil | ||||
X | X | X | X | Faulty switch | Replace switch | |||||
X | X | X | X | Break in the wires of the ignition system | Replace damaged wires | |||||
X | X | X | X | X | Incorrect ignition timing | Replace switch | ||||
X | X | X | X | Damaged vacuum hoses | Replace damaged hoses | |||||
X | X | X | X | Faulty ignition timing controller | Replace ignition distributor | |||||
X | X | X | X | X | X | X | Incorrect ignition timing | Adjust ignition timing | ||
X | X | X | X | X | X | X | X | X | Engine to be repaired | |
X | X | X | X | Use of low octane gasoline | Only use fuel with the required octane rating | |||||
X | X | X | X | Engine idle adjustment is broken | Adjust idle |