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oil pressure gauge goes up and down while idling
Seven reasons oil pressure gauge goes up and down while idling;
1. The engine may have carbon deposits. When there is too much carbon in the engine, the injected gasoline will be absorbed by the carbon, resulting in too little mixture, making it difficult to start. Sometimes the combustible mixture of the engine will become thicker and thicker, which will cause the idle speed to shake after a cold start, and the idle speed will be unstable.
Solution: When the car is running at high speed, the engine has a large amount of gas in and out, so you can discharge some carbon deposits or go to the maintenance station for cleaning.
2. Excessive fouling of the throttle valve and intake duct. Too much fouling on the throttle valve and the intake duct will also affect and hinder the inflow and outflow of air, making it impossible to accurately control the idling intake air volume, and it is also difficult to burn effectively.
Solution: Spray a small amount of "carburetor cleaner" into the throttle valve, and then carefully scrub it with a polyester rag or high-spun "non-woven fabric".
3. The fault caused by the spark plug. Usually the decline in the activity of the spark plug also affects the performance of the car, and the problem of unstable idle speed occurs.
Solution: Go to the 4S shop for maintenance and adjustment.
4. Failure of fuel pressure. When the fuel pressure is too high, the fuel injection quantity will be increased, and the mixture will be too rich. On the contrary, if the oil pressure is too low, a small amount of gas will be ejected, and the gas produced will be too thin, which will cause the car's idling speed to fluctuate.
Solution: Clean the fuel injector, throttle body and idle motor. Go to a repair shop for overhaul if necessary.
5. The three-way catalytic converter is blocked. The three-way catalytic converter is the most important external purification device installed in the exhaust system of a car. When it is blocked, it will not only affect the power output performance of the vehicle, but also the phenomenon of high and low idle speed mentioned today is also It is possible.
Solution: You can add oxalic acid solution to the fuel tank for cleaning, but you must pay attention to the conversion ratio of oxalic acid solution and soaking time, if used improperly, it will damage the internal structure.
6. The viscous substance is attached to the fuel injector. If there are a lot of viscous substances attached to the fuel injector, there will be phenomena such as accelerated wear of the cylinder and piston rings, so that the car will fluctuate when idling, and the power of the car will also be affected.
Solution: remove the fuel injector for cleaning, both inside and outside can be taken into consideration, not only can remove the internal impurities, but also can remove the carbon deposit attached to the head of the fuel injector.
7. The ignition advance angle is too large or too small. Then the ignition advance angle is too large or too small, which will also cause the car's idle speed to fluctuate.
Solution: adjust the ignition angle.
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