What are the causes of engine shaking in a Focus?

[VonAlexa]

Here are the reasons for engine shaking in a Focus and their solutions: 1. Ignition system failure: Spark plugs, high-voltage wires, and ignition coils may experience poor performance after a certain period of operation. Solution: Inspect the working condition of spark plugs, high-voltage wires, and ignition coils, and replace the spark plugs if necessary. 2. Aging engine components: When the car's engine is idling and the electrical system is turned on, it increases the engine load, causing idle speed to drop. To compensate for the shaking caused by the drop in idle speed, the engine will automatically raise the RPM slightly. Solution: Replace the engine mounts. 3. Unstable oil pressure: Abnormal fuel pump pressure or incorrect readings and poor performance of the intake pressure sensor can also cause engine shaking. Solution: Visit a 4S shop to check the fuel pressure and the intake pressure sensor for proper functioning, and replace related components if necessary.