Bad timing. It's 1 tooth. Why?

The engine power is reduced, the work is unstable, and the engine will shake.

This is called valve timing in the engine, which means that the piston works with the valve. If it is not correct, the valve and piston will not cooperate well. When the engine is working, the valve cannot be opened or closed well.

Extended data

Common fault causes of excessive engine oil consumption;

1. The coolant temperature sensor is abnormal.

2. The air flow meter or intake pressure sensor is abnormal.

3. The throttle position sensor is abnormal.

4. The fuel pressure is too high.

5, cold start injector oil leakage or cold start control disorder.

6. The fuel injector leaks oil.

7, oxygen sensor failure.

8, ignition system failure.

9, engine mechanical parts failure (low cylinder pressure, etc. ).

10, valve timing is incorrect.

1 1)ECU and connector failure.

Common causes of engine automatic flameout;

1, vacuum leakage of intake pipe.

2. Idle speed instability caused by improper idle speed adjustment, dirty throttle body and poor idle speed control system.

3. The fuel pressure is unstable, such as excessive wear or poor contact of the electric fuel pump brush, or the fuel pump filter screen is blocked.

4. The exhaust gas recirculation valve is blocked or the bottom leaks.

5, fuel pump circuit, fuel injector drive circuit and other circuits have poor contact and other faults.

6. The fuel pump relay, EFl relay and ignition relay are defective.

7. The ignition system doesn't work well. For example, the high-voltage spark is weak, the spark plug has been used for too long, the ignition timing is wrong, the ignition coil is poorly contacted or there is a turn-to-turn short circuit when it is hot, so there is no high-voltage spark or the high-voltage spark is weak, the low-voltage wire is poorly contacted, the insulation glue is damaged, and the grounding is intermittently grounded.

8. The throttle position sensor is defective.

9. The air flow meter or intake pressure sensor is faulty.

10, coolant temperature sensor and oxygen sensor are faulty.

1 1. Crankshaft position sensor failure, such as no speed signal (the plug is not plugged properly, the signal line of the crankshaft position sensor is broken, the sensor positioning screw is loose, the gap is unbalanced, and the sensor is damaged. ).

Broken teeth of the crankshaft position sensor signal ring gear will lead to flameout during acceleration; The temperature stability of electronic components in crankshaft position sensor is poor, which will lead to abnormal signal and intermittent flameout failure.

References:

Baidu encyclopedia-engine

Baidu encyclopedia-valve