how to clean fuel injectors on Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.

2. Remove Engine Cover

• Use a socket set to remove any bolts securing the engine cover.
• Gently lift off the engine cover and set it aside.

3. Disconnect Fuel Injectors

• Locate the fuel injectors on the fuel rail.
• Carefully disconnect the electrical connectors on each injector by pressing the release tab.
• Use a socket set to remove the bolts securing the fuel rail to the intake manifold.

4. Remove Fuel Rail and Injectors

• Gently pull the fuel rail away from the intake manifold, making sure to remove the injectors from the rail if they do not come off with it.
• Take care to avoid damaging the O-rings on the injectors.

5. Clean Fuel Injectors

• Use an ultrasonic cleaner or fuel injector cleaning kit according to the manufacturer's instructions.
• If using a cleaning kit, connect the cleaning solution to the fuel rail and follow the kit instructions for cleaning.
• Rinse the injectors with clean fuel or solvent to remove any remaining cleaning solution.

6. Reinstall Fuel Injectors and Fuel Rail

• Apply a small amount of engine oil to the O-rings of the cleaned injectors to ensure a proper seal.
• Reinsert the injectors into the fuel rail or intake manifold as appropriate.
• Reattach the fuel rail to the intake manifold, securing it with bolts to the specified torque (usually around 15-20 Nm).

7. Reconnect Electrical Connectors

• Reattach the electrical connectors to each injector, ensuring they click into place securely.

8. Reinstall Engine Cover

• Place the engine cover back on and secure it with the bolts removed earlier.

9. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and let it idle for a few minutes to ensure proper operation and check for leaks.