Delphi FP10557 Fuel Injection Pressure Regulator

Fuel Pressure Control for Volvo and Saab

The Delphi FP10557 fuel injection pressure regulator is built for vehicles that need stable fuel pressure at the rail. With OE-based engineering and a metal body, it supports consistent fuel delivery for select Volvo S90, Volvo V90, Volvo 960, Saab 900, and Saab 9000 applications.

Key Features

• Fuel injection pressure regulator with a 44 system pressure rating
• Metal construction for durable underhood service
• Threaded inlet connection with push-in outlet design
• Clamp-style mounting for secure installation
• Single inlet and single outlet port layout
• No gauge port and non-adjustable design
• Delphi FP10557 replacement for select Volvo and Saab fuel systems

Detailed Product Overview

Delphi FP10557 is a fuel injection pressure regulator engineered for precise fuel system control in select late-1990s Volvo and early-1990s Saab vehicles. It uses a threaded 14.0 mm inlet and an 8.0 mm push-in outlet, with metal construction and clamp mounting to match the original fuel system layout. Delphi draws on OE heritage and supplier experience to build aftermarket parts with application-specific fitment and consistent performance characteristics.

This part cross-references Dorman OE Solutions 800-273 for the same application. It is also referenced by Standard Ignition PR161.

What It Helps Address

• Fuel pressure that is too high or too low at the injection system
• Hard starting caused by unstable fuel delivery
• Rough idle related to inconsistent rail pressure
• Fuel mixture issues tied to regulator wear
• Driveability problems in Volvo S90, Volvo V90, Volvo 960, Saab 900, and Saab 9000 fuel systems

Installation Notes and Tips

Verify inlet and outlet port sizes, threaded inlet style, push-in outlet style, and clamp mounting before installation. Confirm the vehicle’s fuel system uses a 44 pressure specification and match the regulator to the exact application listed. For fitment, this part fits 1997-1998 Volvo S90, 1997-1998 Volvo V90, 1992-1997 Volvo 960, 1994 Saab 900, 1991-1992 Saab 900, and 1990-1994 Saab 9000.

Quality Assurance

Delphi builds this regulator using OE experience and knowledge developed through long-term supplier relationships with major automakers. That OE-based background is reflected in the part’s materials, connection style, and application-specific design for select Volvo and Saab fuel injection systems.