The water heater won't catch fire.

1, and the battery voltage is lower than 10V, resulting in insufficient starting energy. You can try to connect to start.

2. The starting motor is badly worn and stuffy.

If the instrument light is normal after the key is turned on, the manual car can try to start the cart. It is not excluded that an automatic car will drive itself. If it is insured, call the accident-free rescue and drag it to the repair shop for further investigation.

Automobile electronic ignition system is completely different from mechanical ignition system. It has an electronic control device for ignition, which contains the ignition control curves (MAP diagrams) required by the engine under various working conditions. The working state of the engine is judged by a series of sensors such as engine speed sensor, intake pipe vacuum sensor (engine load sensor), throttle position sensor and crankshaft position sensor.

Find out the ignition advance angle required by the engine in this working state on the diagram and ignite according to this requirement. Then, according to the knock sensor signal, the above ignition requirements are corrected to make the engine work at the best ignition time.

At present, the more popular Atkinson engine changes the compression ratio by adjusting the intake time and ignition time to achieve the purpose of fuel saving.