What is the reason why the car needs to be ignited twice to start?

A cold car is difficult to start. The first fire, it didn't work. The second time was fine. After the engine is started, it doesn't matter whether it is turned on or not. What is the reason? The first ignition was difficult and the second ignition was normal. Generally, there is something wrong with the fuel system or the air intake system, which needs further diagnosis. It takes two ignitions to start. Fault analysis: 1. If the instrument panel illuminates the malfunction lamp, connect the vehicle scan tool to read the malfunction code. These are the following figures. This car is difficult to start. Read fault code P3078, throttle adjusting unit: air flow is too low at idle speed. It shows that the throttle valve or air filter is too dirty, which affects the low air intake. After removing the throttle valve, it was found to be dirty. After cleaning, it began to return to normal. 2. Insufficient fuel pressure. You can use a special auto repair pressure gauge for inspection. If the fuel pressure is lower than the normal range, it will cause difficulties in starting the cold car and weak acceleration. If the fuel pressure is insufficient, it means that the fuel pump is deflated or the gasoline filter is too dirty. Try replacing the gasoline filter first. 3. The battery performance is degraded. When the car is cold-started, a large current is needed. If the automobile battery is aging or the voltage is too low, it can't supply the large current needed to start the motor, which will affect the starting speed and ignition intensity and make it difficult to start the engine. 4. Oil problem. The oil is not suitable and the viscosity is too high. When the engine is cold-started, the resistance of the rotating part of the engine is too great to drive the starting motor to an appropriate speed. Try changing low viscosity engine oil, for example, 5w-40 engine oil can be changed into 5w-30 engine oil. 5. Crankshaft position sensor. For several engines like Peugeot, this probability is relatively high, the camshaft position sensor is faulty, and the ignition time is wrong when the cold car is started, and it is started two or three times. It is difficult to start the cold car for the first time, and it can only be started two or three times, indicating that the engine must have encountered problems. It is suggested to focus on the above aspects. If it is not always difficult to start, the fuel quality may be too poor. Is it bad to refuel recently? You can try another gas station.