my Toyota Highlander XU70 (2020-Present) has a hard start after refueling

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery.
• Ensure the vehicle is parked on a level surface and set the parking brake.

2. Inspect and Replace Fuel Filter

• Sub-steps:
  • Locate the fuel filter; refer to the vehicle’s service manual for its exact position.
  • Use a socket set to remove the bolts securing the filter.
  • Disconnect the fuel lines from the filter carefully to avoid spilling fuel.
  • Install the new fuel filter, ensuring the flow direction is correct.
  • Reconnect the fuel lines and secure the filter with bolts to the manufacturer's torque specifications.

3. Test and Replace Fuel Pump (if necessary)

• Sub-steps:
  • Access the fuel pump, typically located in the fuel tank; consult the service manual for specifics.
  • Remove the access cover and disconnect the electrical connector.
  • Use a multimeter to test the fuel pump for electrical continuity.
  • If the pump is faulty, remove it by unscrewing the retaining ring and pulling it from the tank.
  • Install the new fuel pump and reassemble the access cover, ensuring all connections are secure.

4. Check Fuel Injectors

• Sub-steps:
  • Remove the engine cover to access the fuel injectors.
  • Disconnect the electrical connectors from each injector.
  • Use a multimeter to test the resistance of each injector; compare with manufacturer specifications.
  • Replace any faulty injectors and reconnect the electrical connectors.