why is my BMW 3 Series F30/F31 (2012-2019) not accelerating properly

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Clean or Replace Throttle Body

• Tools Required: Throttle body cleaner, socket set, screwdriver
  1. Remove the air intake duct connected to the throttle body.
  2. Unbolt and detach the throttle body from the intake manifold.
  3. Clean the throttle body using throttle body cleaner and a soft cloth.
  4. Reinstall the throttle body and reconnect the air intake duct.
  5. Reconnect the battery.

3. Check and Replace Fuel Filter (if necessary)

• Tools Required: Fuel line disconnect tool, wrench, drip pan
  1. Relieve fuel system pressure using the fuel pump fuse or relay.
  2. Disconnect the fuel lines from the fuel filter using the disconnect tool.
  3. Remove the old fuel filter and install the new one, ensuring the flow direction is correct.
  4. Reconnect the fuel lines and check for leaks.

4. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
  1. Locate and disconnect the MAF sensor from the air intake duct.
  2. Clean the MAF sensor with MAF sensor cleaner, avoiding contact with the sensor elements.
  3. Reinstall the sensor and reconnect the electrical connector.

5. Inspect Ignition Components

• Tools Required: Socket set, spark plug socket
  1. Remove the ignition coils or spark plug covers as needed.
  2. Inspect spark plugs for wear; replace if necessary with OEM specifications.
  3. Test ignition coils for proper resistance; replace any faulty coils.