What happens to the engine that can cause a fire?

Hello, the common causes of engine fire are as follows:

(1) The ignition coil corresponding to the relevant cylinder has poor contact or excessive resistance, and the ignition coil is damaged.

(2) The cylinder line of the related cylinder leaks, breaks, the spark plug gap is too large or too small, or there is carbon deposition between the electrodes.

(3) Air flow. The powertrain control module detects that the output of the MAF sensor is lower than the normal air flow, resulting in a lean mixture.

(4) Air intake system. The air leaking into the air intake system bypasses the air flow sensor, causing the mixture to be diluted. Check the vacuum hose for disconnection or damage.

(5) The crankcase ventilation valve is improperly installed or faulty, or the assembly surface of throttle body, exhaust gas recirculation valve and intake manifold leaks vacuum.

(6) The 6)EGR valve is not working well, resulting in too thin mixture or too high exhaust gas recirculation flow.

(7) Gasoline pressure. Failure of electric gasoline pump, blocked gasoline filter or failure of gasoline pressure regulator lead to inappropriate gasoline pressure, resulting in too lean mixture.

(8) Fuel injector. Dirty and stuck fuel injectors lead to poor fuel atomization; O-ring seal of injector is damaged; Poor control circuit of injector leads to long-term injection or non-injection of injector.

(9) There are impurities in the fuel, and there is a problem with the quality of the oil.

(10) The engine mechanical failure caused the cylinder compression pressure to be unbalanced.

(1 1) The engine timing is wrong and the valve clearance is abnormal.