In cars with long mileage and older age, the frequency of under powered faults is relatively high, and most of the faults are relatively easy to find. However, whether in 4S stores or repair shops, it is often a waste of money. Although only one component needs to be repaired or replaced to solve the problem, the repair shop will not only replace this component, but will also add one or two additional items. Saying that there are problems in all of these areas and that they need to be done simultaneously to solve the problem, the car owner can only agree in order to repair the car well, which is actually an extra cost. Today, let's summarize the reasons for a car's lack of power. What are the following?

        
 Firstly, the most common issue is that one of the spark plugs is damaged and the cylinder cannot ignite for work. If one cylinder is missing, there will be a significant decrease in power and severe engine shaking. This fault is very easy to find. First, locate the cylinder that is not working and remove the spark plug. Most spark plugs are damaged due to breakdown, and black lines can be seen on the ceramic part. Replacing the spark plugs of this cylinder can solve the problem, and whether the spark plugs of other cylinders are also replaced depends on their service life. If the mileage that needs to be replaced is reached or close, then it should be replaced at the same time, otherwise only one cylinder needs to be replaced.

        
     Secondly, there is a serious problem of carbon deposition. Whether it's carbon buildup on the throttle, fuel injector, or cylinder, any severe carbon buildup can lead to a decrease in power. The excessive carbon accumulation in the throttle and intake duct can affect the intake volume and speed, and the excessive carbon accumulation in the throttle can also cause the throttle to become stuck, resulting in a delayed response of the fuel valve. Carbon accumulation on the fuel injector can cause poor gasoline atomization and incomplete combustion. Excessive carbon accumulation in the cylinder will reduce the volume of the combustion chamber and also absorb some oil vapor, ultimately leading to incomplete combustion. A slight buildup of carbon has minimal impact on power and requires no disassembly or cleaning. If there is a significant decrease in power due to carbon buildup, the engine needs to be disassembled and cleaned.
        
     The following two are less common reasons: blockage of the three-way catalytic converter and blockage of the air filter. One is affecting the exhaust and the other is affecting the intake. Whether the intake is not smooth or the exhaust is not smooth, it will cause a significant decrease in power. First of all, let's talk about the air filter. If it has not been replaced for tens of thousands of kilometers and is very dirty, it will greatly affect the intake volume. Insufficient intake and low fuel injection will inevitably result in a decrease in power. Three way catalytic blockage can affect the exhaust, producing a lot of exhaust gas after combustion, which cannot be discharged and forms a large back pressure. Many exhaust gases will also return and enter the cylinder, affecting the air fuel ratio. Just like someone blocking the exhaust pipe with something, the acceleration becomes stuffy, and the engine speed cannot increase, so naturally there is not much power. Why is it assumed that the blockage of the three-way catalytic converter is due to poor exhaust, rather than elsewhere? Because the entire exhaust pipeline and other parts are very thick pipes that were not intentionally blocked by humans, they cannot be blocked by themselves. Only the ternary catalyst here is constructed with densely packed pinhole sized pores for exhaust gas to pass through. Due to the small pores, any abnormalities can only be blocked here.

        
Finally, there is a gasoline issue, as adding substandard fuel or adding low-grade fuel to the original application may result in a significant decrease in power. This is easy to determine. If the car was normal before, and there was a lack of power after just refueling or driving a few kilometers, it can basically be determined that it was a problem with gasoline. I clearly feel a lack of power, indicating that the oil quality is very poor. It is best to replace it in a timely manner to avoid using it for too long and affecting other areas as well.

From: WONDEE Autoparts 2023-9-27