my Honda Civic has a check engine light and runs rough what does this mean

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plugs

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the ignition coil covers if applicable.
• Use the spark plug socket to remove each spark plug.
• Inspect spark plugs for signs of wear or fouling.
• Replace with new spark plugs as per manufacturer specifications (typically torqued to 13-16 lb-ft).

3. Check and Replace Ignition Coils

• Tools Required: Socket set, multimeter
• Disconnect the wiring harness from each ignition coil.
• Remove the ignition coils using the socket set.
• Test each ignition coil with a multimeter to ensure they are functioning properly.
• Replace any faulty ignition coils with new ones, ensuring proper seating.

4. Clean or Replace Fuel Injectors

• Tools Required: Fuel injector cleaner kit or replacement injectors
• Remove the fuel rail to access the fuel injectors.
• Clean the injectors using a fuel injector cleaner kit or replace them if they are clogged or damaged.
• Reinstall the fuel rail and ensure all connections are secure.

5. Inspect Air Intake System

• Tools Required: Screwdrivers, vacuum gauge
• Check the air filter for dirt or clogging and replace if necessary.
• Inspect the intake hoses for cracks or leaks and replace them if needed.
• Use a vacuum gauge to test for any leaks in the intake system.