What are the reasons why any one cylinder is on fire and two or three cylinders are on fire?

Any cylinder is on fire, and the second and third cylinders are on fire. The reasons are analyzed as follows:

In the case of single cylinder or multi-cylinder fire, there are many possibilities:

First, electrical wiring:

1, electrical wiring aging, leakage, intermittent ignition failure;

2, ignition coil or spark plug failure, poor ignition or poor conductivity;

3, loose lines, broken skin grounding, etc. ;

4. Man-made operational reasons, such as carelessness or mistakes in maintenance: failures caused by contact and loose connectors.

Second, the engine:

1, wear and aging, untimely maintenance, or use inferior, unqualified or unqualified engine oil;

2, due to excessive wear, cylinder pressure can not reach the normal value, etc. ;

3. Belt aging and ignition timing;

4. Valve timing, air intake part or throttle part is damaged.

Third, the oil circuit:

1, insufficient injection pressure, electronic oil pump failure;

2. The oil circuit is blocked or has impurities, resulting in poor oil supply;

3. Nozzle failure, blockage or self-failure;

4. The fuel injection caused by the line is abnormal.