What are the reasons for difficult vehicle starting?

[StHayden]

There are several reasons for difficult vehicle starting: 1. Ignition difficulties caused by carbon deposits in the car: When idling, it is accompanied by slight shaking. Cleaning the throttle valve, intake tract carbon deposits, and fuel injectors can solve the problem. 2. Weak ignition energy of spark plugs: If spark plugs are not replaced after the maintenance cycle, the ignition energy of the spark plugs will decrease, and in severe cases, it will cause misfires. Moreover, the engines of many current models are mostly direct-injection, which places higher demands on spark plugs. 3. Insufficient low fuel pressure: Insufficient oil pressure in the low-pressure oil circuit directly leads to secondary ignition of the engine. The specific reason is that the first ignition fails to start the car because the low-pressure oil circuit is building up oil pressure, and the second ignition can start the car. Specific inspection components: fuel pressure regulator, fuel pump, fuel filter, and internal pipelines.