why does my Toyota RAV4 XA40 (2013-2018) have a rough idle when I start it

Solution

1. Preparation

• Gather necessary tools: OBD-II scanner, fuel pressure gauge, socket set, torque wrench, and cleaning supplies.
• Ensure the vehicle is parked on a level surface and the engine is off. Disconnect the battery to ensure safety.

2. Replace Clogged Air Filter

• Remove the air filter housing cover using a socket set.
• Take out the old air filter and clean the housing with a damp cloth.
• Install a new air filter according to the manufacturer's specifications.
• Reattach the housing cover and secure it with the appropriate torque values.

3. Fuel System Inspection

• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "On" position without starting the engine to check fuel pressure.
• If pressure is below specifications, inspect the fuel pump and fuel filter for issues, replacing components as necessary.

4. Spark Plug Replacement

• Remove the ignition coils using a socket set.
• Take out the old spark plugs with a spark plug socket, inspecting them for wear.
• Install new spark plugs with the correct gap specifications, tightening them to the manufacturer's torque specifications.
• Reinstall the ignition coils securely.

5. Throttle Body Cleaning

• Disconnect the air intake duct from the throttle body.
• Use a throttle body cleaner and a soft cloth to clean the inside of the throttle body thoroughly.
• Reattach the air intake duct, ensuring a secure connection.

6. Vacuum Leak Repair

• Inspect all hoses connected to the intake manifold for cracks or disconnections.
• Replace any damaged hoses and ensure all connections are tight.