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ford f150 oil pressure gauge fluctuation
1. Dirty air filter: The air filter is designed to protect the engine and reduce wear and tear. It is generally replaced every 10,000 kilometers. If it is not replaced in time, insufficient intake air will cause low idle speed, which will cause the engine to vibrate. Just replace it The filter will do the trick.
2. Open circuit of high voltage line: Open circuit of high voltage line refers to the open circuit of the wire core of high voltage line, which can affect the ignition and cause engine vibration. Use a multimeter to measure the resistance, and replace the one whose resistance is obviously several times larger.
3. Spark plug life: Spark plugs have a life span. After more than 30,000 to 40,000 kilometers, the ignition efficiency will be significantly reduced, and it will affect the ignition. This is the most common fault. Just replace all the spark plugs.
4. Low idle speed: The idle speed value of the engine has been set in the computer. When the rotation speed is low to a certain range, the car computer will automatically adjust it. If the idle speed is too low and vibration occurs, it means that it is beyond the control range of the computer. Some cars have an adjusting screw on the throttle to adjust the idle speed, while some cars cannot adjust the idle speed. For this kind of car, you can check the idle speed valve, throttle valve, and air flow meter. , Vacuum sensor, adjust the ignition time (cars with distributors), you can increase the idle speed. If the water temperature is low, the idle speed will also be low. You can check and replace the thermostat.
5. Abnormal water temperature: The engine operating temperature has a normal range. If the water temperature is high, the ignition time will be earlier, the oil-air mixing ratio will be changed, the oil viscosity will be thinner, and the lubrication performance will be worse. The general cause of the fault is the vibration caused by the lack of antifreeze, the thermostat cannot be opened, the fan does not turn, and the temperature of the temperature control switch is not accurate. The above faults can be eliminated.
6. Fuel injector blockage: The fuel injector of EFI vehicles is a key component for automobile fuel injection, and its service life is very long and can reach hundreds of thousands of kilometers. However, because the glue in the gasoline will block the fuel injection holes of the fuel injectors, the fuel injection volume of each fuel injector will be inconsistent, resulting in inconsistent work of each cylinder, causing the engine to shake. The solution is to remove it and clean it.
7. Carbon deposits and grease clogging: The throttle valve, idle valve, and air intake hole will have carbon deposits, grease clogging, and poor air intake after a period of use, which will affect the smooth idle speed and cause jitter. It can be solved by checking and cleaning the above parts with cleaning agent, without removing them for cleaning.
8. Low cylinder pressure: There are 3 cylinders, 4 cylinders, 5 cylinders, 6 cylinders, and 8 cylinders in the engine. If one cylinder does not work well, there will be a lack of cylinders and the engine will shake. The three-cylinder engine is the most obvious, and the four-cylinder engine is second. Use the cylinder pressure gauge to check the cylinder pressure, and use Xinba to solve the problem of low pressure. Xinba has a unique effect on cylinder depression and imbalance. It can be added to the engine oil or directly added to the cylinder to restore the balance cylinder pressure.
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