why does my Toyota RAV4 engine shake when idling

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Engine Mounts

• Sub-steps:
  1. Use a jack to support the engine slightly.
  2. Remove any components obstructing access to the engine mounts (e.g., air intake).
  3. Unbolt the damaged engine mount using a socket set and replace it with a new mount.
  4. Torque bolts to manufacturer specifications (check service manual for specific torque values).
  5. Reassemble any removed components and lower the engine.

3. Check and Replace Spark Plugs and Ignition Coils

• Sub-steps:
  1. Remove the ignition coil cover, if applicable.
  2. Disconnect the ignition coils and remove them using a socket set.
  3. Inspect spark plugs for wear; replace with new ones if necessary (use OEM recommended specifications).
  4. Reinstall ignition coils and ensure they are seated properly.

4. Clean or Replace Fuel Injectors

• Sub-steps:
  1. Disconnect the fuel lines and electrical connectors from the fuel injectors.
  2. Remove the fuel rail to access the injectors.
  3. Clean the injectors using a fuel injector cleaning kit or replace them if severely clogged.
  4. Reinstall the fuel rail and ensure all connections are secure.

5. Test and Clean Idle Air Control Valve

• Sub-steps:
  1. Locate the IAC valve (usually found on the throttle body).
  2. Disconnect the electrical connector and remove the valve from the throttle body.
  3. Clean the valve with throttle body cleaner to remove carbon buildup.
  4. Reinstall the IAC valve and reconnect the electrical connector.