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The B9 S4 is a remarkable vehicle known for its performance and engineering. One of the most effective ways to enhance its power is by installing a COBB Accessport. This article will guide you through the process step-by-step, ensuring you achieve a 40 horsepower increase.
What You Will Need
- COBB Accessport
- OBD-II connector
- Computer with COBB software
- Basic hand tools
- Owner’s manual for your B9 S4
Step 1: Preparing Your Vehicle
Before you begin the installation process, ensure your vehicle is parked on a level surface and that the engine is turned off. Gather all necessary tools and equipment.
Step 1.1: Disconnect the Battery
To avoid any electrical issues, disconnect the negative terminal of the battery. This will ensure that no power is running through the vehicle while you work on it.
Step 2: Connecting the Accessport
Locate the OBD-II port in your B9 S4. This port is usually found under the dashboard near the steering column. Plug the COBB Accessport into this port.
Step 2.1: Powering On the Accessport
Turn the vehicle’s ignition to the “On” position without starting the engine. This will power on the Accessport, allowing you to navigate its menu.
Step 3: Installing the Software
Using your computer, download the COBB Accessport Manager software from the COBB website. Follow the instructions to install the software on your computer.
Step 3.1: Updating the Accessport
Connect the Accessport to your computer using a USB cable. Open the Accessport Manager software and check for any available updates. Install these updates to ensure your Accessport is running the latest firmware.
Step 4: Flashing the ECU
Return to your vehicle and navigate through the Accessport menu. Select the option to “Tune” your vehicle and choose the appropriate map for your B9 S4. Follow the prompts to flash the ECU.
Step 4.1: Monitoring the Process
During the flashing process, it is crucial to keep the vehicle’s ignition on. Do not turn off the ignition or disconnect the Accessport until the process is complete. This usually takes around 10-15 minutes.
Step 5: Finishing Up
Once the ECU has been successfully flashed, you will receive a confirmation message on the Accessport screen. At this point, you can disconnect the Accessport from the OBD-II port.
Step 5.1: Reconnecting the Battery
Reconnect the negative terminal of the battery. Make sure it is secured tightly to avoid any electrical issues.
Step 6: Testing Your Vehicle
Start your B9 S4 and allow it to idle for a few minutes. Check for any warning lights on the dashboard and ensure everything is functioning correctly.
Step 6.1: Taking It for a Test Drive
Once you are satisfied that everything is in order, take your vehicle for a test drive. Pay attention to the throttle response and overall performance. You should notice a significant increase in horsepower.
Conclusion
Installing a COBB Accessport on your B9 S4 is a straightforward process that can lead to impressive performance gains. By following these steps, you can enjoy an increase of up to 40 horsepower, enhancing your driving experience significantly.