my BMW 3 Series E90/E91 (2005-2012) has no power when I press the accelerator

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat, stable surface.
• Disconnect the battery to avoid electrical shorts.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Fuel pressure gauge
• Multimeter

2. Inspect and Clean the Throttle Body

• Remove the air intake duct connected to the throttle body.
• Use throttle body cleaner and a soft cloth to clean the throttle plate and housing.
• Check throttle position sensor (TPS) for proper function using a multimeter; ensure it is within specifications.
• Reinstall the air intake duct securely.

3. Check Fuel System

• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure reading.
• If the pressure is below specifications, check the fuel pump relay and fuse.
• Replace the fuel filter if necessary.

4. Inspect Ignition System

• Remove spark plugs and inspect for wear or fouling.
• Replace any damaged or worn spark plugs.
• Test ignition coils for proper resistance using a multimeter; replace faulty coils.

5. Transmission Inspection

• Check transmission fluid level and condition; top off or change fluid if dirty.
• Inspect for any fault codes related to the transmission using an OBD-II scanner.
• If necessary, perform a transmission reset or relearn procedure.