why does my Toyota RAV4 XA50 (2019-2024) engine misfire on acceleration

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is on a flat surface and secure it with wheel chocks.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Using a socket set, remove the spark plug wires or ignition coil (depending on your engine configuration).
  3. Use a spark plug socket to remove the old spark plugs.
  4. Inspect the old spark plugs for wear; replace with OEM or equivalent spark plugs, ensuring the proper gap.
  5. Reinstall the ignition coils or spark plug wires securely.

3. Inspect and Replace Ignition Coils (if necessary)

• Sub-steps:
  1. Remove the ignition coils one by one, noting their positions.
  2. Test each coil with a multimeter for resistance (check specifications for your model).
  3. If any coils are faulty, replace them with OEM parts.
  4. Reinstall each coil securely.

4. Clean or Replace Fuel Injectors

• Sub-steps:
  1. Disconnect the fuel line using a fuel line disconnect tool, ensuring to relieve fuel pressure beforehand.
  2. Remove the fuel rail bolts and detach the fuel rail along with the injectors.
  3. Inspect injectors for clogs; clean them using a specialized injector cleaner or replace with new ones.
  4. Reinstall the fuel rail and reconnect the fuel line securely.

5. Check Air Intake and Vacuum Lines

• Sub-steps:
  1. Visually inspect the air intake hoses for cracks or leaks.
  2. Check all vacuum lines connected to the intake manifold.
  3. Replace any damaged hoses.
  4. Reinstall any removed components and ensure all clamps are tight.