why is my Ford Mustang S650 (2024-Present) fuel gauge not working properly

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Ensure the vehicle is on a level surface for safety.

2. Access the Fuel Sending Unit

• Tools Required: Socket set, screwdrivers, fuel line disconnect tool.
• Remove the rear seat or access panel to reach the fuel tank.
• Disconnect the fuel lines using the fuel line disconnect tool, being cautious of any residual pressure.
• Remove the retaining ring or screws that hold the fuel pump assembly in place.

3. Inspect and Replace the Fuel Sending Unit

• Carefully lift the fuel pump assembly from the tank.
• Inspect the fuel sending unit for wear or damage; replace if necessary.
• If the unit is intact, clean the electrical connections to ensure a good contact.
• Reinstall the fuel pump assembly, ensuring the O-ring is properly seated to prevent leaks.

4. Reassemble and Reconnect

• Replace the retaining ring or screws, tightening to manufacturer specifications (consult the repair manual for torque values).
• Reconnect the fuel lines securely.
• Reinstall the rear seat or access panel.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Turn the ignition key to the ON position (without starting) to prime the fuel system and check for leaks.
• Start the engine and monitor the fuel gauge for correct operation.