why does my Genesis G70 IG (2017-2023) engine misfire when I accelerate

Learn how to diagnose and fix engine misfires during acceleration in Genesis G70 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plugs

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connectors and remove the coils using a socket wrench.
• Remove old spark plugs with a spark plug socket.
• Inspect the new spark plugs for proper gap; adjust if necessary.
• Install new spark plugs and torque them to the manufacturer's specifications (usually around 13-15 lb-ft).
• Reinstall the ignition coils and reconnect the connectors.

3. Inspect and Replace Ignition Coils (if necessary)

• If any ignition coils were found faulty during diagnostics, remove them by unscrewing their mounting bolts.
• Replace with new coils, ensuring they are seated properly.
• Reconnect the electrical connectors.

4. Check and Replace Fuel Injectors (if necessary)

• Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
• Disconnect the fuel lines and electrical connectors from the injectors.
• Remove the old injectors and install new ones, ensuring proper alignment and sealing.
• Reconnect fuel lines and electrical connectors.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses for cracks or disconnections.
• Replace any damaged hoses and ensure all connections are tight.
• Use a smoke machine or aerosol carb cleaner to detect leaks while the engine is running.