my Toyota RAV4’s engine runs rough after filling up with gas

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Fuel System Inspection

• Sub-steps:
  • Lift the vehicle using a jack and secure it with jack stands.
  • Inspect the fuel lines and connections for signs of leakage or damage.
  • If a fuel leak is found, replace the damaged section of the fuel line.

3. Fuel Pressure Test

• Sub-steps:
  • Connect the fuel pressure gauge to the test port on the fuel rail.
  • Turn the ignition to the "On" position without starting the engine to check the fuel pressure reading.
  • Compare the reading with manufacturer specifications. If pressure is low, check the fuel pump and replace it if necessary.

4. Cleaning the Fuel Injectors

• Sub-steps:
  • Use a fuel injector cleaner or remove the injectors for ultrasonic cleaning.
  • Reinstall cleaned injectors and ensure proper sealing.

5. EVAP System Inspection

• Sub-steps:
  • Locate the EVAP canister and purge valve.
  • Inspect for cracks or blockages and replace any faulty components.
  • Clear any error codes from the OBD-II scanner after repairs.