why does my Toyota RAV4 XA50 (2019-2024) have poor fuel economy suddenly

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Air Filter

• Remove the air filter housing cover using a socket set.
• Take out the old air filter and clean the housing with a vacuum.
• Install a new air filter, ensuring it is seated properly.
• Reattach the housing cover and secure it.

3. Inspect and Replace Spark Plugs

• Remove the ignition coil cover (if applicable) using a socket set.
• Disconnect the ignition coils and remove them from the spark plugs.
• Use a spark plug socket to remove the old spark plugs.
• Inspect the old spark plugs for wear and replace them with new ones, using a torque wrench to tighten to the manufacturer’s specifications (typically around 13-15 ft-lbs).
• Reinstall the ignition coils and cover.

4. Clean Fuel Injectors

• Use a fuel injector cleaner additive in the fuel tank if injectors are suspected to be clogged.
• If necessary, remove the fuel injectors for manual cleaning:
  • Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
  • Disconnect fuel lines and electrical connectors from the injectors.
  • Use a specialized injector cleaning kit to clean the injectors.
  • Reinstall injectors and reconnect all lines and connectors.

5. Tire Inspection and Inflation

• Check tire pressures using a tire pressure gauge and inflate to the manufacturer’s recommended PSI.
• Inspect tires for uneven wear and replace if necessary.