| Malfunction | Reason/Action |
| Unstable turnover | Check and adjust idle speed on a warm engine |
| Difficulty in moving the gas pedal | Adjust |
| The fuel line between the injection pump and the fuel filter is loose | Fasten the clamps |
| The injection pump mounting plate has cracked | Check. Replace |
| Poor fuel supply | Dirty fuel filter. The fuel injection and return lines are dirty, kinked or pinched at the connection points |
| The injectors are faulty | Check. Injector insulators are faulty |
| Fuel injection timing is out of adjustment | Adjust |
| The injection pump is faulty | Replace |
| Mechanical engine faults | Check the engine. Compression. |
| Loud knocking noises in the engine | Dirt in the fuel system. Replace the injectors. Blow the fuel lines |
| Insulators and copper sealing gaskets are not installed correctly. | The insulators and injector holders burned out. The injector holders are tightened with a high torque. Replace the faulty parts. Install correctly |
| The glow plug glow rod is broken. Got burnt. | Replace a faulty glow plug |
| Air in the fuel system | Check the tightness of the connections, tighten with a force of 70 Nm. Install the fuel lines and tighten the nuts with a force of 25 Nm. |
[Material taken from an internet portal opelbook.ru]
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