my Honda Civic 9th Generation (2012-2015) feels like it's losing power when driving

Solution

1. Preparation

• Gather tools: OBD-II scanner, fuel pressure gauge, multimeter, socket set, torque wrench, and safety glasses.
• Disconnect the battery to prevent electrical shocks.

2. Address Fuel Supply Issues

• Check Fuel Pressure:

  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading against the manufacturer specifications (typically 40-50 psi for Honda).
  3. If the pressure is low, inspect the fuel pump and fuel filter for blockages or failure.

• Replace Fuel Filter (if necessary):

  1. Locate the fuel filter (in-line or integrated depending on model).
  2. Disconnect the fuel lines using a fuel line disconnect tool.
  3. Remove the mounting bolts and replace the filter.
  4. Reconnect the fuel lines, ensuring there are no leaks.

3. Inspect and Replace Spark Plugs

• Remove the ignition coils from the spark plugs.
• Using a socket set, remove the old spark plugs.
• Inspect the spark plugs for wear; replace if necessary with OEM-equivalent plugs.
• Torque new spark plugs to the manufacturer's specifications (typically around 13-16 lb-ft).

4. Clean or Replace MAF Sensor

• Disconnect the MAF sensor wiring harness.
• Remove the MAF sensor from the intake tract.
• Clean the sensor with MAF sensor cleaner spray or replace it if heavily contaminated.
• Reinstall the MAF sensor and reconnect the wiring harness.

5. Check and Replace Throttle Position Sensor (if faulty)

• Disconnect the TPS connector.
• Remove the TPS from the throttle body.
• Test the TPS with a multimeter for proper resistance values during throttle movement.
• Replace the TPS if it fails the test.
• Reinstall and reconnect the TPS.