1. Spark plug wires: If the spark plug wires are old, cracked, or loose, they can cause the engine to misfire, which can lead to shaking.
2. Spark plugs: Worn out or fouled spark plugs can also cause misfiring and shaking.
3. Fuel injector: A faulty fuel injector can cause the engine to run lean or rich, which can lead to shaking.
4. Vacuum leaks: Vacuum leaks can cause the engine to run rough and shake.
5. Engine mounts: Worn out engine mounts can allow the engine to move around excessively, which can cause shaking.
6. Driveline components: A damaged driveshaft, universal joints, or axle can also cause the engine to shake.
7. Transmission issues: A transmission that is slipping or has other problems can also cause the engine to shake.
8. Internal engine problems: More serious issues such as piston ring wear, bearing wear, or valve problems can also cause the engine to shake.
