Delphi FG1666 Fuel Pump Module Assembly - Left

Delphi Fuel Pump Module Assembly for Ford Mustang

The Delphi FG1666 fuel pump module assembly is designed specifically for Ford Mustang models requiring a reliable in-tank electric fuel pump. Engineered to deliver consistent fuel flow and pressure, this module supports gasoline fuel systems with precision and durability.

• Electric fuel pump with 12.0 voltage operation
• Compatible with gasoline fuel type
• Maximum pressure rating of 73 psi and system pressure of 40 psi
• Includes external strainer and fuel level sender assembly
• Quick connect outlet with 0.375 inch outside diameter
• Four male blade terminals for secure electrical connection
• Average flow rating of 21 liters per hour and average current draw of 10 amps
• Standard replacement grade for dependable performance

Technical Details and Features

The Delphi FG1666 fuel pump module assembly is an in-tank electric pump designed to meet the fuel delivery demands of Ford Mustang vehicles. It features a quick connect outlet type with a 0.375 inch outside diameter, ensuring compatibility with factory fuel lines. The pump operates at 12 volts and provides a maximum pressure of 73 psi, with a system pressure set at 40 psi to maintain optimal fuel delivery. The module includes an external strainer inlet to protect the pump from contaminants and a fuel level sender assembly with a float arm for accurate fuel gauge readings. Electrical connections are made via four male blade terminals, providing a secure and reliable interface. The pump’s resistance ranges from 180 ohms when empty to 10 ohms when full, supporting efficient current draw and fuel flow rated at 21 liters per hour.

Compatible Applications and Common Issues Solved

• Replacement for failing or noisy fuel pumps in Ford Mustang gasoline engines
• Resolves inconsistent fuel pressure causing engine hesitation or stalling
• Addresses inaccurate fuel level readings due to faulty sender assemblies
• Eliminates fuel delivery interruptions from clogged or damaged strainers
• Restores proper electrical connectivity with blade terminal design

Installation Notes and Tips

Installation of the Delphi FG1666 fuel pump module assembly requires removal of the fuel tank to access the in-tank pump. Ensure the vehicle’s battery is disconnected before beginning work to prevent electrical hazards. Verify that the quick connect outlet and blade terminals match the vehicle’s fuel line and wiring harness. Although the module does not include a gasket or lock ring, reuse the original components or replace them as needed to maintain a proper seal. Follow the included instruction sheet carefully to ensure correct installation and avoid damage to the fuel system.

Quality Assurance and Warranty

Delphi fuel pump modules are manufactured to meet OEM specifications for fit, form, and function. The FG1666 is a standard replacement grade part designed for reliable operation in Ford Mustang vehicles. While specific warranty details may vary, Delphi products typically come with a limited warranty covering defects in materials and workmanship. Refer to the product documentation or contact the manufacturer for exact warranty terms.