why does my Honda Civic 9th Generation (2012-2015) have poor fuel economy

Solution

1. Preparation

• Collect necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to ensure safety.

2. Replace Air Filter

• Remove the air filter housing cover using a socket set.
• Take out the old air filter and inspect the housing for debris.
• Install a new air filter, ensuring it fits snugly.
• Reattach the air filter housing cover and tighten it securely.

3. Clean or Replace MAF Sensor

• Locate the MAF sensor in the intake duct.
• Disconnect the electrical connector and unscrew the sensor from the duct.
• Clean the sensor using MAF cleaner (do not use oil or other cleaners).
• Allow it to dry, then reinstall the sensor and reconnect the connector.

4. Inspect and Replace Spark Plugs

• Remove the ignition coil or spark plug wires.
• Use a spark plug socket to remove the old spark plugs.
• Inspect the spark plugs for wear; replace with new plugs if necessary (gap them to specifications).
• Reinstall the ignition coils or spark plug wires.

5. Check Tire Pressure and Condition

• Use a tire pressure gauge to check each tire's pressure.
• Inflate tires to the recommended PSI (found on the driver’s door jamb).
• Inspect tires for uneven wear and replace if needed.

6. Inspect Fuel Injectors

• If issues persist, check fuel injectors for clogs using a fuel injector cleaning kit.
• Disconnect the fuel rail and apply the cleaner following the kit instructions.
• Reassemble everything securely, ensuring no fuel leaks are present.