my Toyota Highlander Fourth Generation (2020-present) engine shakes when idling what's the problem

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent any electrical issues during repair.

2. Inspect and Replace Engine Mounts

• Sub-steps:
  1. Lift the vehicle using a jack and secure it with jack stands.
  2. Remove any components obstructing access to the engine mounts (if necessary).
  3. Visually inspect engine mounts for cracks, separations, or excessive wear.
  4. If damaged, remove the bolts securing the engine mounts using a socket set.
  5. Replace with new engine mounts, ensuring proper alignment, and torque the bolts to manufacturer specifications.

3. Check and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover (if applicable) to access the ignition coils.
  2. Disconnect the electrical connectors from the ignition coils and remove the coils.
  3. Use a spark plug socket to remove the spark plugs and inspect them for wear or deposits.
  4. Replace with new spark plugs, ensuring to use the correct gap as specified by the manufacturer.
  5. Reinstall ignition coils and reconnect electrical connectors.

4. Clean the Throttle Body

• Sub-steps:
  1. Disconnect the throttle body intake duct.
  2. Use throttle body cleaner and a soft cloth to clean the throttle plate and interior.
  3. Ensure the throttle plate operates smoothly without sticking.
  4. Reconnect the intake duct securely.