my Genesis G70 has a check engine light and runs rough what's wrong

Solution

1. Preparation

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

2. Address Ignition System

• Sub-step 1: Remove the engine cover if applicable using a socket set.
• Sub-step 2: Disconnect the spark plug wires or ignition coil connectors.
• Sub-step 3: Use a spark plug socket to remove the spark plugs; inspect for wear or fouling.
• Sub-step 4: If spark plugs are worn, replace them with OEM or high-quality aftermarket plugs; torque to manufacturer's specifications (usually around 13-16 ft-lbs).
• Sub-step 5: Reinstall ignition coils and reconnect the spark plug wires.

3. Check Fuel System

• Sub-step 1: Attach the fuel pressure gauge to the fuel rail.
• Sub-step 2: Turn the ignition to the "On" position (do not start the engine) and check the pressure against manufacturer specifications (usually between 40-60 psi).
• Sub-step 3: If pressure is low, inspect the fuel filter and fuel pump for issues; replace if necessary.
• Sub-step 4: Reconnect any fuel lines and remove the gauge when done.

4. Inspect MAF Sensor

• Sub-step 1: Locate the mass airflow sensor in the intake duct.
• Sub-step 2: Disconnect the electrical connector and remove the sensor.
• Sub-step 3: Clean the MAF sensor with MAF cleaner spray; do not touch the sensing element.
• Sub-step 4: Reinstall the sensor and reconnect the electrical connector.

5. Check for Vacuum Leaks

• Sub-step 1: Visually inspect all vacuum hoses for cracks or disconnections.
• Sub-step 2: Use a smoke machine or spray soapy water on hoses while the engine is idling to identify leaks.
• Sub-step 3: Replace any defective hoses as necessary.