Delphi FP10399 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE-Style Performance

The Delphi FP10399 fuel injection pressure regulator is built for precise fuel system control in select Ford, Lincoln, and Mercury applications. With metal construction, push-in inlet and outlet connections, and a 30 system pressure rating, it supports stable fuel delivery for classic EFI setups.

Compatible With 1980-1987 Ford Thunderbird, Mercury Cougar, Ford Mustang, Mercury Capri, Mercury Marquis, Ford LTD, Lincoln Continental, Lincoln Mark VII, Lincoln Town Car, Mercury Grand Marquis, and Lincoln Mark VI applications. Delphi FP10399 is a direct-fit fuel injection pressure regulator for vehicles that require OE-style fuel pressure regulation.

Key Features

• Fuel injection pressure regulator for air and fuel delivery systems
• Metal body construction for durable service
• Push-in inlet and outlet ports for factory-style connections
• One inlet and one outlet port
• Bolt-on mounting type
• Non-adjustable design
• No gauge port
• System pressure rating: 30
• Inlet port diameter: 10.0 mm (0.39 in)
• Outlet port diameter: 6.0 mm (0.24 in)

Product Details

Delphi FP10399 is engineered for fuel injection systems that need consistent pressure regulation at the rail or fuel delivery point. Delphi draws on OE heritage and decades of supplier experience, which is reflected in the fit, materials, and connection style used in this regulator. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Fits 1983-1987 Ford Thunderbird, N/A; Fits 1983-1987 Mercury Cougar, N/A; Fits 1984-1986 Ford Mustang, N/A; Fits 1984-1986 Mercury Capri, N/A; Fits 1984-1986 Mercury Marquis, N/A; Fits 1983-1985 Ford LTD, N/A; Fits 1982-1985 Lincoln Continental, N/A; Fits 1980 Lincoln Continental, N/A; Fits 1984-1985 Lincoln Mark VII, N/A; Fits 1981-1985 Lincoln Town Car, N/A; Fits 1983-1985 Mercury Grand Marquis, N/A; Fits 1980-1983 Lincoln Mark VI, N/A.

Common Uses

• Restoring fuel pressure control on EFI-equipped classic Ford, Lincoln, and Mercury vehicles
• Replacing a regulator with inconsistent fuel delivery
• Addressing fuel pressure-related drivability concerns
• Correcting rich or lean running caused by pressure regulation issues
• Returning factory-style fuel system operation after regulator wear

Installation Notes

Verify inlet and outlet port sizes before installation and confirm the mounting location matches the original regulator. Because this unit uses push-in connections and a bolt mount, proper alignment with the existing fuel lines and bracket is important for a secure seal. Always confirm vehicle-specific fuel system requirements against the original part number FP10399 before installation.

Quality Assurance

Delphi builds aftermarket parts using OE experience and knowledge developed through supplier relationships with major automakers. FP10399 reflects that background with a metal regulator design and factory-style connection layout for select Ford, Lincoln, and Mercury fuel injection systems.