why does my Genesis G70 have a rough idle when warm

Solution

1. Preparation

• Gather necessary tools and parts.
• 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. Inspect and Replace Spark Plugs

• Remove the ignition coil cover using a socket set.
• Disconnect the electrical connectors from the ignition coils.
• Remove the ignition coils using a socket wrench.
• Check the spark plugs for wear or damage; replace if necessary.
• Install new spark plugs (torque to manufacturer specifications, typically around 13-15 lb-ft).
• Reinstall ignition coils and reconnect electrical connectors.

3. Clean Throttle Body

• Remove the air intake duct connected to the throttle body.
• Use throttle body cleaner and a soft brush to clean the throttle plate and surrounding area.
• Reattach the air intake duct securely.

4. Check and Replace Fuel Filter

• Locate the fuel filter (consult the service manual for specific location).
• Relieve fuel system pressure before disconnecting lines.
• Disconnect the fuel lines and remove the fuel filter.
• Install the new fuel filter and reconnect the fuel lines securely.

5. Inspect and Repair Vacuum Leaks

• Visually inspect all vacuum hoses for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to check for leaks while the engine is running.
• Replace any damaged hoses and ensure all connections are tight.