how to fix a Honda Civic 9th Generation (2012-2015) that won’t accelerate properly

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on electrical systems.
• Allow the engine to cool down before proceeding.

2. Clean or Replace Air Filter

• Remove the air filter housing cover using a socket set.
• Take out the air filter and inspect it for dirt and debris.
• If dirty, clean it with compressed air or replace it with a new one.
• Reinstall the air filter and housing cover, ensuring all clips are secured.

3. Fuel System Check

• Locate the fuel pressure test port on the fuel rail.
• Connect the fuel pressure gauge to the test port.
• Turn the ignition key to the "ON" position (do not start the engine) and check the pressure reading. It should be within the manufacturer’s specifications (usually around 30-50 PSI).
• If pressure is low, inspect the fuel pump and filter for possible replacement.

4. Throttle Body Cleaning

• Remove the air intake duct connected to the throttle body by loosening the clamps.
• Use throttle body cleaner and a soft cloth to clean the inside of the throttle body, paying attention to the throttle plate.
• Reattach the air intake duct securely after cleaning.

5. Inspect and Replace Spark Plugs

• Remove the ignition coil by unscrewing the bolts and disconnecting the electrical connector.
• Unscrew the spark plugs using a spark plug socket.
• Inspect the spark plugs for wear and replace any that appear worn or fouled with new OEM plugs.
• Torque the new spark plugs to the manufacturer’s specifications (typically around 13-15 lb-ft).

6. Test MAF Sensor

• Disconnect the MAF sensor electrical connector.
• Use a multimeter to check voltage and ensure it falls within the manufacturer’s specified range (refer to service manual).
• If the MAF sensor is faulty, replace it with a new unit.