why does my Honda Civic have a rough engine noise when idling

Solution

1. Preparation

• Gather necessary tools and parts for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent any electrical issues during the process.

2. Inspect and Replace Spark Plugs

• Remove the spark plug wires or ignition coils carefully.
• Use a spark plug socket to remove the old spark plugs.
• Inspect the spark plugs for wear; replace with new ones if necessary, ensuring to gap them as per specifications.
• Reinstall the spark plugs and reconnect the wires or coils.

3. Check and Replace Air Filter

• Locate the air filter housing and remove the cover.
• Take out the old air filter and inspect for dirt and blockages.
• Install a new, clean air filter, ensuring it sits correctly in the housing before securing the cover back.

4. Address Engine Oil Issues

• Check the oil level using the dipstick; top off with the correct oil type if low.
• If the oil appears dirty or contaminated, drain the old oil and replace it with new oil and a new oil filter.

5. Inspect and Repair Vacuum Leaks

• Check all vacuum hoses for cracks or disconnections.
• Replace any damaged hoses and ensure all connections are secure.
• Use a smoke machine to identify any hidden leaks if necessary.