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Malfunction
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Possible cause codes
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| Difficult start |
1 – 9, 12, 13, 20, 22
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| Erratic idle |
1, 2, 14, 18, 21, 22
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| Uneven idle speed of a warm engine |
2, 10, 13, 17, 20, 22
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| Engine misfires under load |
1, 2, 4, 5 – 10, 16, 22
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| Engine power loss |
1, 4 – 7, 9, 10, 11, 13, 15, 16. 19-22
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| Increased fuel consumption |
7, 9, 10, 11, 13, 14, 19, 21, 22
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| The engine does not stop |
3, 21, 22
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| Blue exhaust at maximum load (white or blue) |
1, 2, 4, 5, 8, 9, 13, 19, 22
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| Abnormal minimum and maximum idle speed move |
14, 15, 18, 21
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| The engine does not accelerate |
1, 2, 4, 6, 8. 9, 10, 19, 20, 21
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| High pressure fuel pump overheating |
16
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POSSIBLE MALFUNCTION
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METHOD OF ELIMINATION
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| 1. Empty fuel tank or clogged vent valve tank |
Fill the tank, flush the fuel lines, clean the ventilation
valve.
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| 2. Presence of air in the fuel system |
Bleed the fuel system, eliminate air leaks.
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| 3. The diesel solenoid valve or regulator is faulty starting fuel supply |
Repair or replace.
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| 4. The fuel filter is clogged |
Replace the fuel filter.
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| 5. Low pressure fuel lines are clogged |
Restore the flow cross-sections of the fuel lines.
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| 6. Low pressure fuel lines are clogged |
Flush or replace fuel lines.
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| 7. Loose connections, fuel lines leaking or broken |
Tighten the connections, eliminate the leak.
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| 8. Paraffin deposits in the fuel filter |
Replace filter, use seasonal fuel.
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| 9. Incorrect fuel injection advance |
Adjust the initial fuel injection advance angle.
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| 10. The injector nozzles are faulty |
Repair or replace.
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| 11. The air filter is clogged | Replace the filter element. |
| 12. The pre-heating system is faulty | Replace faulty spark plugs. |
| 13. The injection distribution among the cylinders does not correspond to the order their works | Reposition high pressure fuel lines in the required order. |
| 14. Abnormal idle speed | Adjust the idle speed with the screw. |
| 15. Abnormal maximum idle speed | Adjust the maximum speed with the screw engine. |
| 16. The bypass valve is clogged or faulty | Clean the calibrated channel or replace valve. |
| 17. The discharge valve is leaking (on a four-cylinder diesel) or two valves (on a six-cylinder) |
Replace the valve.
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| 18. Force of the buffer spring of the diesel engine speed regulator not adjusted | Adjust the force of the buffer spring. |
| 19. The fuel injection advance clutch is faulty | Repair or replace the coupling. |
| 20. Low compression | Restore compression. |
| 21. The speed controller is faulty or not adjusted engine | Adjust or replace the regulator. |
| 22. The high pressure fuel pump is faulty or does not respond adjustment | Remove the pump and send it in for repair. |
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