Talking about a broken down car.

If the car can start normally, but it will shake and accelerate weakly, it is likely that the spark plug on the engine is broken. Let me tell you what the specific symptoms will be. What will happen to the car if the spark plug is broken?

At present, there are several kinds of spark plugs on the market, such as nickel alloy, silver alloy, yttrium gold, platinum, iridium gold, iridium platinum fire, etc., and there will be different replacement cycles according to their different materials. Generally speaking, nickel alloy spark plugs are often used in some low-end models because of their low price, and their service life is about 20 thousand kilometers. With the development of technology, the spark plugs made of iridium gold, iridium platinum and other materials have become popular, and their service life has also become longer, which can generally be used for about 6-65438+ 10,000 kilometers.

Carbon deposition will lead to poor ignition of the engine. The dielectric layer and insulating layer of the insulator or shunt resistor will be damaged because the carbon deposit produced in the incomplete combustion process adheres to the surface of the insulator of the center electrode. If there is enough carbon deposition on the surface of the center electrode and insulator, the main conduction path may change from generating sparks to short-circuiting through carbon deposition. This is also called spark leakage. After the short circuit caused by carbon deposition, the available voltage transmitted to the electrode tip of the center electrode decreases until no spark is transmitted to the mixed gas, and poor ignition will occur.

If there is black deposit on the spark plug electrode, it should be handled in time. First of all, the type of black sediment should be determined, so as to determine the treatment method. If the deposit comes from the air filter, the spark plug of the car should be removed in time and then cleaned with gasoline. If the sediment comes from carbon deposition, the proportion of mixed gas should be adjusted, and the mixed gas should be fully burned by driving at high speed for a long time to eliminate carbon deposition.

The air conditioner is easy to start, or even if it is started, it is easy to put out the fire. Although there are many reasons for this phenomenon, most of them are spark plugs. Let the engine run at idle speed, short-circuit the spark plug cylinder by cylinder with a screwdriver, and listen carefully to the changes of engine speed and noise. The speed and noise change obviously, indicating that the spark plug is normal. When the speed and noise are not obvious, the spark plug is in an abnormal state.

The ignition performance of spark plug directly affects the performance of engine. If the power is weakened, the fuel consumption is increased, the acceleration is uneven, it is difficult to start, the oil and gas barbecue is insufficient, and the mileage is about 20 thousand kilometers, it can almost be judged that the spark plug should be replaced. The spark plug flashover ignition system failed, and the high-voltage electricity directly discharged from the outside of the porcelain bottle to the shell without passing through the center electrode of the spark plug, which led to the surface flashover of the porcelain bottle of the spark plug, and there were obvious arc ablation marks on the surface of the porcelain bottle along the axial direction.