Delphi FP10559 Fuel Injection Pressure Regulator - Right

Fuel Pressure Control for OE Applications

The Delphi FP10559 fuel injection pressure regulator is built for precise fuel system control in select Jaguar and Audi applications. It uses a metal body, threaded inlet and outlet ports, and a clamp-style mount to support a secure, OE-style replacement on the right side where specified.

With a fixed 44 system pressure rating and no gauge port or adjustability, this regulator is designed for direct replacement use in fuel injection systems that require stable pressure regulation. Delphi draws on OE heritage and decades of supplier experience to build aftermarket parts with application-specific fitment in mind.

Key Features

• Delphi FP10559 fuel injection pressure regulator
• Metal construction for fuel system durability
• Threaded inlet and outlet connections
• Clamp mounting type for secure installation
• Fixed 44 system pressure
• No adjustable setting and no gauge port
• Right-side position listed for applicable vehicles

Detailed Product Overview

This fuel injection pressure regulator is intended for vehicles that require consistent fuel pressure control to maintain proper injector operation. The Delphi FP10559 is listed for 1985-1992 Jaguar XJS, right; 1990-1997 Jaguar Vanden Plas; 1990-1997 Jaguar XJ6; 1993-1996 Jaguar XJS; 1995-1997 Jaguar XJR; and 1990-1991 Audi 200 Quattro. It is also listed for 1988-1989 Jaguar Vanden Plas and 1988-1989 Jaguar XJ6 to engine #180511.

This part cross-references Beck/Arnley 158-0319 and Gates 22824 for the same application. The Delphi FP10559 is a direct-fit style replacement for fuel injection pressure regulator service on Jaguar XJ6, Jaguar XJS, Jaguar Vanden Plas, Jaguar XJR, and Audi 200 Quattro applications where the listed port size, mounting style, and pressure specification match.

Common Problems This Part Can Address

• Fuel pressure that is too high or too low for the injection system
• Hard starting caused by unstable fuel delivery
• Rough idle related to inconsistent injector pressure
• Fuel mixture issues tied to regulator wear
• Pressure loss from a worn threaded regulator assembly

Installation Notes and Tips

Verify inlet and outlet port diameter, threaded connection style, and mounting location before installation. Confirm the vehicle application by year, model, and engine note where listed, especially for 1988-1989 Jaguar Vanden Plas and 1988-1989 Jaguar XJ6 applications limited to engine #180511. Replace only with the correct regulator specification for the fuel system, and inspect surrounding fuel lines and seals during service.

Quality Assurance

Delphi builds this part using OE experience gained from supplying major automakers, with aftermarket engineering informed by original equipment knowledge and application requirements.