why is my BMW 3 Series F30/F31 (2012-2019) losing power when accelerating

Solution

1. Preparation

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

2. Inspect Air Intake System

• Tools Required: Socket set, screwdrivers
• Remove the air intake duct and check the air filter for clogs; replace if necessary.
• Inspect hoses for cracks or leaks; replace damaged hoses.
• Reinstall the air intake duct securely.

3. Check Fuel System

• Tools Required: Fuel pressure gauge
• Locate the fuel rail and attach the fuel pressure gauge.
• Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading against specifications.
• If pressure is low, replace the fuel pump or fuel filter as needed.

4. Inspect Ignition System

• Tools Required: Socket set, spark plug socket
• Remove spark plugs and inspect for wear or deposits; replace if the gap is incorrect or if they appear fouled.
• Test ignition coils for proper resistance and replace any faulty coils.

5. Clean Throttle Body

• Tools Required: Throttle body cleaner, toothbrush or soft cloth
• Remove the throttle body from the intake manifold.
• Clean the throttle plate and housing with throttle body cleaner to remove carbon buildup.
• Reinstall the throttle body and ensure all connections are secure.

6. Test MAF Sensor

• Tools Required: Multimeter
• Disconnect the MAF sensor and use a multimeter to check voltage output as per manufacturer specifications.
• If the readings are out of range, replace the MAF sensor.