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

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and ensure the engine is cool.
• Disconnect the battery before starting any electrical work.

2. Inspect and Replace Faulty Components

A. Air Intake System

• Remove the air intake duct.
• Inspect for cracks or loose connections; replace any damaged components.
• Clean the air filter and replace if necessary.

B. Fuel System

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the "on" position without starting the engine and check the pressure reading; it should match manufacturer specifications (typically around 50-60 psi for BMW).
• If pressure is low, check the fuel pump relay, fuse, and wiring. Replace the fuel pump if necessary.

C. Ignition System

• Remove spark plug wires and inspect for damage or corrosion.
• Replace spark plugs if they are worn or fouled, ensuring to gap them correctly according to specifications (usually around 0.032 inches for BMW).
• Inspect ignition coils for cracks or signs of wear and replace if needed.

D. MAF Sensor

• Disconnect the MAF sensor connector.
• Remove the sensor from the air intake pipe and clean it with MAF cleaner.
• Reinstall the MAF sensor and reconnect the connector.

E. Throttle Body

• Remove the throttle body from the intake manifold.
• Clean the throttle body with throttle body cleaner, paying attention to the butterfly valve.
• Reinstall the throttle body and ensure it is securely fastened.