Volkswagen magotan suddenly failed to catch fire. What's wrong with Magotan not catching fire?

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The main reasons why Volkswagen Magotan can't start on fire are engine oil circuit, circuit and mechanical failure. From the oil circuit, the main faults are low gasoline pressure and poor atomization; From the circuit, the spark plug electrode gap is too large, the ignition energy of the ignition coil is reduced, and the cylinder line is short-circuited or open-circuited; The causes of engine mechanical failure are complicated, such as whether the valve is not tightly closed and whether there is too much carbon deposition inside the engine. When there is too much carbon deposit in the engine, the gasoline sprayed by the fuel injection head will be absorbed by the carbon deposit during the cold start, which leads to the lean mixture during the cold start and makes it difficult to start. It is not easy to enter the car before the gasoline absorbed by carbon deposits reaches saturation. After entering the car, the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine for combustion, which will make the mixture rich, and the combustible mixture of the engine will be diluted and concentrated, resulting in idling jitter after cold start. Because the lower the temperature, the more oil is needed for cold start, and the existence of carbon deposit will affect the smooth start.