why does my Toyota Highlander shake when I start the engine

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical systems.
• Allow the engine to cool if it has been running.

2. Inspect and Replace Engine Mounts

• Tools Required: Socket set, jack stands, torque wrench.
• Sub-steps:
  1. Lift the vehicle using a jack and secure with jack stands.
  2. Inspect the engine mounts visually for any cracks or signs of wear.
  3. Remove the bolts securing the damaged mounts using the socket set.
  4. Install new engine mounts, ensuring they are properly aligned.
  5. Torque the bolts to the manufacturer's specifications.

3. Replace Spark Plugs and Ignition Coils

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coils and remove them using the socket set.
  3. Remove old spark plugs with a spark plug socket.
  4. Install new spark plugs, ensuring they are gapped correctly.
  5. Reinstall the ignition coils and reconnect wiring.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, safety glasses.
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position to check pressure readings.
  3. If pressure is low, inspect the fuel pump and filter for blockages or failures.
  4. Replace any faulty components as necessary.