Should I wait until the idle speed drops before driving?

The engine speed during cold start is higher than that during hot start, so it is best to wait until the engine idle speed reaches the normal value before driving on the road. At this time, the vehicle has completed the high idle running during the cold start, and the oil has reached the part where the engine needs lubrication. It's better to drive the engine on the road. It is necessary to slow down at idle before driving. The reasons are as follows: 1, the engine temperature can't meet the driving standard when the car is temporarily stopped, and all the lubricating oil flows back to the oil pan; 2. When the car is cold started, the oil sensor and the engine temperature sensor transmit information to the ECU. At this time, the ECU arithmetically processes the information of the driving reference with insufficient temperature and lubrication, and transmits the execution information to a series of sensors such as throttle position sensor, mixture concentration and air flow rate. 3. The lubrication function is sufficient. After the temperature reaches the minimum driving standard, the oil pressure sensor, the oil temperature sensor and the engine temperature sensor send information to the ECU, and the ECU sends the execution information to the throttle position sensor after processing, and the throttle opening is properly closed, so that the engine speed is reduced; 4. This design of the engine should also remind the driver, especially when starting the car in winter, the engine will not automatically slow down for the first time, so try not to drive immediately. This can avoid the wear and tear of the engine and protect its service life.