What are the causes of engine shaking when the car is cold?

[June]

Car cold engine shaking causes are: 1. Engine mechanical failure, uneven cylinder pressure; 2. Intake pipe leakage, excessive carbon deposits on intake valves and intake pipes, or excessive dirt on throttle and intake pipe walls; 3. Abnormal water temperature and intake temperature signals or circuit faults; 4. Excessive carbon deposits on spark plugs or damaged ignition coils; 5. High-voltage wires and distributor cap leakage; 6. Excessive internal carbon deposits in fuel injectors causing poor sealing or blockage. Solutions for car cold engine shaking: 1. Check for engine faults or clean engine carbon deposits; 2. Check the working condition of spark plugs and ignition coils; 3. Check for circuit issues.