The whole car shakes during ignition and the engine fails to start?

[Roman]

The reasons why the whole car shakes during ignition and the engine fails to start are as follows: 1. Severe carbon deposits in the engine. The throttle is too dirty or the fuel injector has excessive carbon buildup. 2. Ignition system issues. Whether the spark plugs, high-voltage wires, and ignition coils are functioning normally. 3. Unstable oil pressure. Whether the fuel supply pressure and the intake pressure sensor are normal. Additional information is as follows: The solutions for the whole car shaking during ignition and the engine failing to start are as follows: 1. Clean the fuel system and check if the idle speed motor has carbon deposits that should be cleaned. 2. Check if the spark plugs have excessive carbon buildup and replace them if necessary. 3. Check the fuel supply pressure and the intake pressure sensor.