how to address a faulty fuel gauge in my Ford Mustang S550 (2015-2023)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Access the Fuel Sending Unit

• Tools Required: Socket set, screwdriver, fuel line disconnect tool.
• Remove the rear seat or access panel to reach the fuel tank (depending on the design).
• Disconnect the fuel lines and electrical connectors from the fuel pump assembly.
• Remove the retaining ring or screws securing the fuel pump assembly to the tank.

3. Inspect and Replace the Sending Unit

• Carefully lift the fuel pump assembly out of the tank.
• Inspect the fuel sending unit for signs of wear or damage.
• If necessary, replace the sending unit:
  • Remove the old sending unit from the assembly.
  • Install the new sending unit in reverse order of removal.
  • Ensure all seals are in place to prevent leaks.

4. Reassemble and Reconnect

• Reinstall the fuel pump assembly into the tank, securing it with the retaining ring or screws.
• Reconnect the fuel lines and electrical connectors, ensuring they are secure.
• Reinstall the rear seat or access panel.

5. Final Checks

• Reconnect the vehicle battery.
• Turn the ignition to the "ON" position without starting the engine to prime the fuel system.
• Check for leaks around the fuel pump assembly.