how to replace a fuel injector in Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Tools Required:
  • Socket set
  • Torque wrench
  • Fuel line disconnect tool
  • Screwdrivers
  • Safety glasses
  • Gloves
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Depressurize the Fuel System

• Locate the fuel pump relay in the fuse box.
• Start the engine and remove the fuel pump relay. This will stall the engine and relieve pressure in the fuel system.
• Disconnect the fuel filler cap to further relieve pressure.

3. Remove Engine Cover

• If applicable, remove any engine covers by unscrewing them using a socket set.
• Set aside the covers in a safe place.

4. Remove Fuel Rail

• Disconnect the electrical connectors from the fuel injectors.
• Use the fuel line disconnect tool to detach the fuel lines from the fuel rail.
• Unbolt the fuel rail using the appropriate socket size and carefully lift it off the injectors.

5. Replace Fuel Injectors

• Remove the old fuel injectors from the fuel rail by twisting and pulling them out.
• Clean the injector ports on the intake manifold.
• Lubricate the O-rings of the new fuel injectors with a small amount of engine oil.
• Insert the new fuel injectors into the fuel rail until they click into place.

6. Reinstall Fuel Rail

• Carefully place the fuel rail back onto the intake manifold, ensuring each injector seats properly.
• Bolt the fuel rail back in place using the torque specifications provided in the service manual.
• Reconnect the fuel lines and electrical connectors to the injectors.

7. Reinstall Engine Cover

• Reattach any engine covers removed earlier and secure them with screws.

8. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Turn the ignition to the "ON" position (without starting) to pressurize the fuel system and check for leaks.
• Start the engine and monitor for any issues.