At what engine speed does it start?
3 Answers
Engine speed is normally between 500 and 850 revolutions per minute. The steps to start a car engine are: 1. Turn the ignition key to the ON position and wait for 5 to 8 seconds when starting; 2. Turn the key to the start position; 3. Immediately release the ignition key after the engine starts successfully, and it will automatically return to the ON position. Precautions for starting a car engine are: 1. Do not start the engine immediately after inserting the key when getting in the car; 2. Do not press the brake first when starting a vehicle with one-button start; 3. When the key fob of a one-button start vehicle is out of battery, bring the key close to the start button; 4. Do not use excessive force when the inserted key cannot be turned; instead, turn the key while simultaneously turning the steering wheel back.
With over a decade of driving experience, I've always paid close attention to the RPM changes when starting the engine. When I turn the key to start, the engine is initially driven by the starter motor, with the RPM rapidly increasing from zero to around 500 RPM—this is the phase when the starter is working. Once ignition is successful, the RPM jumps to between 700 and 1000 RPM. On cold winter mornings, the RPM might surge to 1200 RPM but stabilizes to the normal range of around 700 RPM after a few minutes. This stable RPM is called idle speed. If it's too high, it could indicate carbon buildup in the throttle body or incomplete combustion due to cold temperatures. If it's too low, the engine may shake or even stall, affecting driving smoothness. Every time I start the car, I make it a habit to glance at the dashboard. If the RPM consistently exceeds 1100 RPM or drops below 600 RPM after starting, it's a sign to watch out for potential issues like worn spark plugs or a weak battery.
As an experienced driver, I emphasize that engine starting RPM is crucial for safe driving. The initial RPM upon starting is usually around 800, then quickly stabilizes between 700-900 RPM. If it's a cold start, reaching 1000 RPM is normal, but persistently exceeding 1200 RPM indicates potential intake/exhaust system blockage or sensor malfunction. The minimum RPM shouldn't drop below 600, otherwise the engine may stall. I've also encountered delayed starting issues - in such cases, check if the battery voltage is sufficient or if the engine oil is too viscous. If the RPM fluctuates after starting, immediately inspect the idle control valve; don't let minor issues become hazards. In summary, developing the habit of monitoring starting conditions can save money and prevent accidents.
