What Causes Engine Shaking When Turning Off the Ignition?

[VonCassidy]

The causes of engine shaking when turning off the ignition: 1. Uneven cylinder pressure across cylinders; 2. Excessive carbon buildup on intake valves and intake pipes, excessive dirt on throttle valves and inner walls of intake pipes; 3. Incorrect coolant temperature and intake air temperature signals, circuit faults; 4. Excessive carbon buildup or incorrect gap on spark plugs, leakage in high-voltage wires or distributor caps; 5. Fuel injectors not closing properly or clogging due to excessive internal carbon deposits. Engine maintenance methods: 1. Use high-quality engine oil; 2. Use qualified coolant; 3. Regularly clean radiator scale; 4. Regularly remove carbon deposits from the car; 5. Replace the car's three filters on time; 6. Maintain reasonable engine speed.