What Causes Car Shaking During Morning Startup?

[StAvery]

The reasons for car shaking during morning startup are: 1. Low fuel pump pressure; 2. Insufficient spark plug ignition energy; 3. Faulty idle control valve; 4. Excessive carbon buildup in the intake pipe. The solutions for morning startup shaking are: 1. Check if the fuel pump pressure is too low; 2. Replace spark plugs; 3. Inspect whether the idle control valve is malfunctioning; 4. Clean carbon deposits from the intake pipe. The functions of spark plugs are: 1. To conduct high-voltage electricity from the ignition coil into the engine cylinder; 2. The spark generated between the spark plug electrodes can ignite the air-fuel mixture, enabling normal engine operation.