my Toyota RAV4 XA50 (2019-2024) has a rough idle at stoplights what's causing it

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical issues.

2. Replace Spark Plugs

• Remove the engine cover if applicable using a socket set.
• Disconnect ignition coil connectors and remove coils using a socket wrench.
• Unscrew and remove old spark plugs with a spark plug socket.
• Install new spark plugs with proper torque specifications (typically around 13-15 ft-lbs).
• Reinstall ignition coils and reconnect connectors.

3. Clean Throttle Body

• Remove the intake duct connected to the throttle body using a screwdriver or socket.
• Spray throttle body cleaner onto a clean cloth and wipe the throttle plate and body.
• Ensure no cleaner residue is left behind, and reassemble the intake duct.

4. Inspect and Replace Air Filter

• Open the air filter housing and remove the old air filter.
• Inspect the housing for debris and clean if necessary.
• Install a new air filter, ensuring it fits snugly in place.

5. Check and Repair Vacuum Leaks

• Visually inspect all vacuum hoses connected to the intake manifold.
• Replace any cracked or damaged hoses with new ones.
• Use a smoke machine or carburetor cleaner to identify any hard-to-find leaks.