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1. Function of Automobile Air Flow Meter
Air Flow Meter (AFM) is the abbreviation for Manifold Air Flow Meter (MAFM), also known as Air Flow Sensor (AFS). Its function is to detect the amount of engine intake air and convert the intake air information into electrical signals to input into the Electronic Control Unit (ECU) for calculating and determining the fuel injection amount. The intake quantity signal is the main basis for the electronic control unit to accurately calculate the fuel injection quantity. If the air flow meter fails, the electronic control unit will activate the standby mode, set the air flow value at 5g/s, and record the fault code. At this time, it will cause unstable idle, engine wheezing, idle idle wandering, high idle speed, increased fuel pulse width, fuel consumption, delayed ignition, and poor exhaust emissions. Fault without signal: Some car models do not start, some car models have unstable idling, shaking, and acceleration stalling. Signal voltage too high or too low: not starting, high or low idle, shaking.
2. Will there be any accidents when pulling out the oil dipstick while the engine is starting?
Something will happen. When the engine is running after driving, the dipstick cannot be pulled out. When the oil dipstick is removed, there is an additional hole in the crankcase that communicates with the atmosphere, and air enters the relatively sealed housing, causing the car to shake. Precautions for using the oil dipstick: Before checking the oil dipstick, it is necessary to park the car in a relatively flat parking space and wait for about 10 minutes to ensure the accuracy of the oil level.
3. Automotive English Translation (Chinese to English)
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