why does my Toyota RAV4 have poor acceleration after a tune-up

Solution

1. Preparation

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

2. Inspect and Replace Air Filter

• Open the air filter housing and remove the old air filter.
• Install a new air filter, ensuring it is seated properly.
• Reassemble the housing and reconnect any clips or screws.

3. Check and Replace Spark Plugs

• Remove the ignition coil or spark plug wires to access the spark plugs.
• Use a spark plug socket to remove each spark plug.
• Check the gap with a feeler gauge and replace any plugs that are worn or damaged. Torque new plugs to the manufacturer's specifications (typically 13-20 lb-ft).
• Reinstall ignition coils or wires.

4. Inspect and Clean Fuel Injectors

• Remove the fuel rail if necessary to access the injectors.
• Use a fuel injector cleaner or a professional cleaning kit to clean each injector.
• Reinstall injectors and ensure they are seated correctly in the fuel rail.

5. Test and Replace Fuel Pump (if necessary)

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position without starting the engine to check the pressure; compare to specifications (usually around 30-50 psi).
• If pressure is low, replace the fuel pump as per the manufacturer’s guidelines.

6. Inspect and Repair Vacuum Hoses

• Visually inspect all vacuum hoses for cracks, wear, or disconnections.
• Replace any damaged hoses and ensure all connections are secure.