When we are driving, we will occasionally feel the abnormal shaking of the engine, which is different from the usual engine shaking, both shaking and vibration are larger. Then what are the reasons for the abnormal shaking of the engine?
Factors in engine shuddering
Cold days, low temperature
Oil fluidity will become poor, engine running resistance will become larger, cold cars will start to warm up when the engine speed is higher than in the summer, sound, vibration, and warm-up time will be longer than in the summer, and fuel consumption will increase accordingly.
Wear and tear of machine parts
The second is the car running on the road, with the increase in mileage, the parts will gradually wear and tear, not the same as when the new car is, good care, and maintenance can slow down the aging of the vehicle, but the wear and tear and the use of traces are irreversible, a rational view. Vibration is relatively normal, you can not pay too much attention, but if it is obvious shaking, throttle cleaning, and spark plugs can be considered for replacement, as fuel filter replacement, and fuel injector cleaning, if these items are still shaking after doing it, consider the engine carbon (EFI machine general carbon process is prolonged, the possibility of lower, and regularly pull a high speed, carbon is very little) or aging of the foot pads (the possibility of). (also very low).
Before we get to the causes of engine shaking, let’s understand two things
Time Requirement
The gas mixture burns in the combustion chamber and the flame spreads from the ignition point in a “wave” fashion in all directions, so it takes a short period from ignition to complete combustion of the oil and gas.
High temperature
Although oil and gas need to be ignited by the spark plug, too high a temperature and high pressure can cause oil and gas to spontaneously combust.
The general knock is because the combustion chamber of oil and gas ignition, the flame has not yet completely spread, remote unburned oil and gas is because of the high temperature or high pressure and spontaneous combustion, its flame and regular combustion of the flame collision and generate great pressure, so that the engine produces abnormal knocking.
High-voltage wire breakage
High voltage wire is a high voltage wire, wire core breakage can affect the ignition, causing abnormal engine shaking, this time we have to use a multimeter to measure the resistance, and replace the one with the largest resistance.
Check the spark plug
The electric spark plug has a life, of more than three kilometers after the ignition efficiency is significantly reduced, which can affect the ignition, which is the most common, this time just need to change the spark plug is good. It is also important to note that the replacement of spark plugs must be replaced together, do not replace only one of them.
Checking your car’s air filter
As you know, the air filter is there to protect the engine from foreign objects or dust. It allows clean air to flow into the engine. If the air filter is clogged, it will cause poor airflow and the engine will shake abnormally.
Check the engine water temperature
The engine has an optimal return to work temperature, if the water temperature is too high or too low, it will cause the oil and gas mixing ratio changes, with adhesion analysis, and lubrication deterioration, at this time, it will cause the engine abnormal shaking.
Check the engine idle speed
Engine idle speed is set by the car computer, when the engine speed is low to a certain range, the car’s traveling computer will automatically adjust, if the idle speed is too low, it will shake, which indicates that it has exceeded the control range of the car computer. This time we have to re-match the engine, throttle, and other parts.
Check for carbon deposits
Engine throttle idle valve, by using a period, and then it will cause carbon deposits, especially in turbocharged engines, grease clogging intake air is not smooth, which will affect the idle speed of the smooth occurrence of shaking, this time we need to check and disassemble the above parts can be solved.
Check the fuel injector
As we all know, nowadays the injector is controlled by a computer, if the injector is abnormal, spraying too little or too much oil will cause the engine idle speed is not unstable. Especially the gel in the gasoline will block the injection holes of the injector nozzle. This leads to inconsistency in the amount of fuel injected into each cylinder of the engine, causing the engine to shake abnormally.
Check whether the engine is missing cylinders
Common engines are four-cylinders, six-cylinders, or eight-cylinders, but if one cylinder does not work, it will cause the engine to run unevenly and cause the engine to shake abnormally. This time we have to go to the workshop to check, which cylinder is missing, what is the reason?
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