What is the reason for tempering when cleaning Tianyu throttle?

There are three main reasons for backfire shooting of automobile engine: 1, and the mixture is too thin: the failure of backfire shooting of automobile engine may be caused by the failure of oil circuit or intake system: the failure of oil circuit is mainly caused by too little fuel injection from injector, and the main reasons for too little fuel injection from injector are: too low oil pressure; The fuel injector is blocked. The fault of the air intake system is mainly caused by the excessive air intake, which is mainly caused by the fault of the sensor controlling the air intake; Air leakage in the intake manifold. 2. There is something wrong with the ignition system: the ignition energy of the automobile engine is insufficient (the resistance of the high-voltage line is too large; Ignition coil is damaged; Insufficient power supply voltage) or spark plug failure. 3. The ignition advance angle is too large: the main reasons for the failure of automobile engine tempering shooting are: improper CKP gap; CKP is loose; The temperature sensor is damaged; Engine load; The electronic control unit is damaged.