When the engine malfunctions and goes to repair the car, one often hears a word called 'cylinder misfire' or 'misfire'. A computer can also detect the fault code, which says' a certain cylinder misfire '. What does this mean? Lack of cylinder actually refers to a certain cylinder not working or not working properly, and gasoline cannot burn and do work normally. Once there is a cylinder shortage fault, it is necessary to repair it in a timely manner, otherwise it will cause the cylinder to accumulate carbon more and more seriously, and the emissions will not meet the standards and pollute the atmosphere. So how do we know our car is out of cylinders?

What will happen if there is a lack of cylinder? Firstly, the engine shakes severely, as one or more cylinders do not work, the balance of the engine will be disrupted. When the crankshaft runs to this point, there should have been cylinder combustion to generate a force to push it, but now it is gone, the speed will decrease. When the next cylinder burns, there will be thrust again, and the speed will increase, resulting in unstable engine speed shaking. That is, the force output by the engine cannot be uniform and continuous, resulting in speed fluctuations. In addition to feeling the engine shaking, it can also be seen from the tachometer that the pointer will continue to fluctuate up and down.

Secondly, the engine power will also decrease, which is easy to understand. When four cylinders were working, suddenly it became three cylinders, and the power will inevitably decrease, resulting in weak acceleration. Finally, fuel consumption will also significantly increase, and many gasoline that does not burn will be wasted. To do the same work, other normal cylinders will need to work several more times. As long as there is a cylinder shortage fault, novice drivers can clearly feel that there is a problem with the car, and the engine fault light will also light up, so there is no need to worry about not knowing about this fault.

What is the general reason for cylinder shortage? The most common ones are ignition systems, spark plugs, or ignition coils, with broken spark plugs being the most common. If it is broken, it cannot be ignited, and if it cannot be ignited, this cylinder cannot burn, resulting in a cylinder shortage. This situation is completely non ignition, shaking can be severe, and faults are easy to find. Even without a computer, you can use the method of unplugging the ignition coils one by one to find them. If the four ignition coils are integrated, they can only be detected by a computer.

Secondly, if the fuel injector is damaged, failure to spray or poor atomization of the fuel injection can also cause the cylinder to not burn properly, leading to cylinder shortage. A serious misfire in a certain cylinder has ruled out the ignition issue, which is usually the problem with the fuel injector. However, the lifespan of fuel injectors is generally longer, and the probability of failure is not too high. Finally, insufficient cylinder pressure in a certain cylinder can also lead to cylinder shortage, such as poor sealing of the piston rings, which prevents the compression stroke from establishing high pressure, resulting in incomplete combustion of gasoline. When doing work, a portion of gasoline energy is also wasted, ultimately leading to cylinder shortage. However, this lack of cylinder is not completely non combustion, it is just incomplete combustion and insufficient energy.

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The above refers to the phenomenon of a certain cylinder misfire, sometimes it is not a single cylinder misfire, but all cylinders are slightly misfired or have misfire records. Slight misfire refers to sometimes missing and sometimes not missing, and computer detection can measure the number of misfires per cylinder. In this situation, the first thing to consider is whether the spark plugs should be replaced, and the problem with the spark plugs should be eliminated first. Secondly, consider whether there is a problem with the gasoline added or with carbon buildup. If there is a record of a misfire, it means that it was previously misfired but is currently normal. This is closely related to gasoline and maintenance is not necessary. When the fuel is used up, switch to a gas station for refueling and observe again. If there is always a slight misfire, and the engine sometimes shakes and sometimes does not, the possibility of carbon accumulation in the spark plug and cylinder is the highest, and it needs to be eliminated one by one.

From: WONDEE Autoparts 2023-10-11