why does my BMW 3 Series E90/E91 smell like gas when I accelerate?

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 any electrical shorts.

2. Inspect Fuel Lines

• Sub-steps:
  • Use a socket set to remove any protective covers.
  • Visually inspect all fuel lines for cracks, wear, or loose connections.
  • Tighten any loose fittings and replace any damaged lines.
• Tools Required: Socket set, flashlight.

3. Replace Fuel Injectors (if needed)

• Sub-steps:
  • Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
  • Disconnect the fuel lines from the fuel rail using a line wrench.
  • Remove the retaining bolts and pull the fuel rail with injectors out.
  • Replace faulty injectors with new ones, ensuring proper orientation.
  • Reassemble by reversing the removal steps.
• Tools Required: Line wrench, socket set, torque wrench.
• Safety Warnings: Be cautious of fuel spills; work in a well-ventilated area.

4. Repair Fuel Tank (if damaged)

• Sub-steps:
  • Remove the rear seat or trunk lining to access the fuel tank.
  • Inspect the tank for cracks or rust; if damaged, replace the tank.
  • For minor leaks, use a fuel tank repair kit to seal cracks.
  • Reinstall any removed components and ensure all seals are tight.
• Tools Required: Socket set, fuel tank repair kit if applicable.