What is the appropriate RPM for a car when it is first started?
2 Answers
When a car is first started, an RPM of around 1000 per minute is appropriate. RPM refers to the number of revolutions per minute of the engine crankshaft. The level of engine RPM is related to the number of work cycles per unit time or the effective power output of the engine. Precautions for starting a car include: 1. Shift to neutral and avoid pressing the accelerator when starting; 2. Turn the key to the 'on' position and wait for the vehicle's self-check before starting the engine; 3. Avoid cranking the starter for more than 30 seconds; 4. If the engine fails to start after three attempts, check the electronic control and fuel systems; 5. Avoid keeping the starter engaged after the engine is running.
Hey, I noticed that the tachometer shoots up pretty high right after starting the engine, usually around 1200 to 1500 RPM. Especially on cold mornings when the temperature is low, the needle jumps up immediately. I asked a technician friend at the 4S店 and learned that the engine needs higher RPM to warm up quickly when it's cold. The engine oil is as thick as honey, and the high RPM helps circulate the oil faster. However, after about 30 seconds, the needle drops on its own. Once it stabilizes around 800 RPM and the temperature gauge starts to move, that's when you can shift into gear and start driving. In winter, you might need to wait a bit longer than in summer. Remember not to rush and step on the gas pedal too hard—being gentle is better for the engine. If the RPM stays high for three to five minutes after starting, there might be an issue with the idle control valve or a sensor.
