The car battery 1 1.8 volts won't start.

It is a common problem that cars can't catch fire, especially older cars, which are easy to happen. The most common cause of misfiring is that the battery is dead, which is also the easiest in rescue. Just use another car with electricity to get electricity, and the car can continue to drive. For other reasons, it can't catch fire. Generally speaking, it can't be solved on the spot, so we have to drag it to the repair shop with a trailer to find the fault. Today, let's talk about the fire. How to judge whether the battery is dead or other reasons?

Generally speaking, you can make a rough judgment only by listening to the sound when starting, and you can't see whether the headlights or instruments are on. Many people say that their cars will not catch fire, but they are not out of power, because the headlights are on and the horn is ringing, just as many old drivers have judged before. In fact, it is very inaccurate to judge whether the battery has electricity with headlights and speakers, because they use very little electricity. Unless there is almost no electricity, the headlights will not turn on and the horn will not sound. If there was a little electricity, they wouldn't be abnormal. The starter needs a lot of current, and the battery voltage will not turn if it is slightly insufficient. The normal battery is 12 volts. When the voltage is lower than 1 1 volt, the vehicle cannot be started.

In the actual rescue, the battery is dead, and most cars are not dead, so the starter will still ring when starting. First, the starter is weak, and there is abnormal sound when it is started normally. When the power is cut off, the starter is obviously unable to rotate, rotates slowly, and the sound becomes smaller. This is the power loss of the battery. Second, when you start, you will only hear a bang, and then there will be no sound, which is also a sign that the battery is dead. If there is no sound when starting, but the instrument is dimmed and the headlights are dimmed, this is a serious battery loss.

If the starter works normally during ignition, it is not the battery that is dead, but other reasons. There are two most common reasons, one is the serious carbon deposition or damage of idle motor or throttle, and the other is the damage of gasoline pump. At present, it is rare to fail to ignite because of ignition failure, because each spark plug is an independent ignition coil and will not be damaged at the same time. How to judge whether it is idle motor or throttle fault? Just loosen the throttle repeatedly while striking the fire. If there is something wrong with the idle motor, you can hit it by stepping on the gas pedal and hitting a light. If it still misses, you can't solve it yourself. Just call for help.

There are also two situations where the lights can't be lit because of improper operation, which will be encountered occasionally. First, the automatic car will be ignited in the D gear, and will be directly turned off when it is temporarily stopped in the D gear. When restarting, you will forget that the gear is not in P gear, and the ignition cannot be started. The second type is manual gear. Vehicles that need to step on the clutch to strike a light forget to step on the clutch, or because the mat is too thick and the clutch is not stepped to the end, it will also lead to failure to start. In both cases, there is no sound and no response when you strike a light. In this case of no response, we should first consider the problems of P gear and clutch.