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Car fire is a headache. In fact, this problem includes a more detailed division. The flameout fault includes four categories: automatic extinguishing, intermittent extinguishing, external conditions caused by quenching and inability to extinguish the fire. We explain the general reasons for the failure from the following 3 aspects. Car fire is a headache. In fact, this problem includes a more detailed division. The flameout fault includes four categories: automatic extinguishing, intermittent extinguishing, external conditions caused by quenching and inability to extinguish the fire. We explain the general reasons for the failure from the following 3 aspects. Vacuum leakage of intake pipe. The joint of the fuel supply system has leaks. Improper adjustment of idle speed. The electric gasoline pump is not working. For example, excessive brush wear or poor contact, or fuel pump filter clogging. Exhaust gas recirculation valve obstruction or bottom leakage. The injector is in trouble. For example, the fuel injector is jammed or jammed, or the control circuit is faulty. The cold start injector has trouble. For example, after starting, flameout. The gasoline pump relay has trouble. The ignition system works badly. For example, no high pressure fire, spark plugs use a long time, ignition timing is wrong, ignition coil contact bad or hot state when there is a short turn to turn short circuit cause no high pressure or high pressure spark and weak. Line fault. Such as bad contact, insulation damage and so on. For electronic control reasons, throttle bodies are dirty. When the accelerator pedal is loosened after acceleration, it is flameout due to no idle transition. The idle motor or control line has trouble. The throttle position sensor has trouble. The air flow meter has trouble. For example, the hotline of the air flow meter is dirty; the internal circuit is connected with the solder joint falling off, and the contact is not good. The intake pressure sensor failure. For example, the rupture of the sensor vacuum hose, sometimes air leakage, sometimes no air leakage, so that the intake pressure sensor signal is normal, sometimes abnormal, causing the engine to accelerate the accelerator pedal to extinguish. The coolant temperature sensor has trouble. The oxygen sensor has trouble. For example, there is no change in the signal voltage of the oxygen sensor, which is likely to cause engine stalling when accelerating. The crankshaft position sensor has trouble. If there is no speed signal; the crankshaft position sensor signal tooth ring break teeth will cause the acceleration to extinguish; if the temperature stability of the electronic component in the crankshaft position sensor is poor, the signal will be abnormal and will cause intermittent flameout failure. ECU has a failure. The pressure regulator is in trouble. The ignition controller or distributor module is defective. There is a fault in the line. Such as sensor or ECU iron lap and so on. The general reason for not extinguishing is 1) the temperature of the engine is too high. 2) the exhaust gas recirculation valve is not working normally or can not be opened. 3) the idle speed is too high. 4) too much Coke in the combustion chamber or failure of the injector. 5) the spark plug is not chosen correctly. For electrical reasons 1) throttle position sensor is faulty. 2) the fuel pressure regulator has a failure. If the seal is not sealed or the diaphragm is damaged 3) the coolant temperature sensor is defective. 4) the intake temperature sensor has trouble. 5) there is a failure of ECU or connector.