Delphi FP10300 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE-Style Repair

The Delphi FP10300 fuel injection pressure regulator is built for direct replacement service on select GM vehicles that need stable fuel delivery. It uses a metal body, a push-in inlet, a threaded outlet, and a bolt-on mounting style to match the original system layout.

With a fixed 54 system pressure rating and no adjustable gauge port, this regulator is suited for restoring consistent fuel pressure in applications such as the Chevrolet Impala, Pontiac Grand Prix, and Buick Century.

Key Features

• Metal construction for fuel system service
• Push-in inlet with 17.0 mm inlet port diameter
• Threaded outlet with 20.0 mm outlet port diameter
• Fixed 54 system pressure specification
• Bolt-mounted design for OE-style placement
• No adjustable setting and no gauge port
• Delphi FP10300 fuel injection pressure regulator for direct-fit replacement use

Detailed Description

Delphi FP10300 is a fuel injection pressure regulator engineered for vehicles that rely on a regulated fuel supply to maintain proper injector performance. Delphi draws on OE experience and supplier knowledge developed through work with major automakers, and that background is reflected in the part’s material choice, port design, and mounting configuration. The FP10300 is a practical replacement when the original regulator is no longer holding pressure correctly.

This part cross-references Standard Ignition PR143 for the same application. It is also listed among replacement options for vehicles including the Chevrolet Malibu, Pontiac Grand Am, and Oldsmobile Alero. If you are searching for a fuel injection pressure regulator for 2000-2005 Chevrolet Impala, 2000-2005 Pontiac Grand Prix, or 2000-2005 Buick Century service, the Delphi FP10300 is a relevant OE-style option.

What It Helps Address

• Hard starting caused by unstable fuel pressure
• Rich or lean running from a failing regulator
• Fuel pressure loss after shutdown
• Driveability issues tied to inconsistent injector supply
• Fuel system faults on regulated return-style applications

Installation Notes and Tips

Confirm inlet and outlet port sizes, mounting style, and system pressure before installation. The FP10300 uses a push-in inlet and threaded outlet, so the fuel line connections must match the original setup. Verify the vehicle application against the fitment list before ordering, especially on 2000-2005 Chevrolet Impala, Pontiac Grand Prix, and Buick Century models.

• Fits 2000-2005 Buick Century, N/A
• Fits 2002-2005 Buick Rendezvous, N/A
• Fits 2000-2005 Chevrolet Impala, N/A
• Fits 2000-2005 Chevrolet Monte Carlo, N/A
• Fits 2001-2005 Pontiac Aztek, N/A
• Fits 2000-2005 Pontiac Grand Am, N/A
• Fits 2000-2005 Pontiac Montana, N/A
• Fits 2000-2004 Oldsmobile Alero, N/A
• Fits 2000-2004 Oldsmobile Silhouette, N/A
• Fits 2000-2003 Chevrolet Malibu, N/A
• Fits 2000-2003 Pontiac Grand Prix, N/A
• Fits 2001-2002 Chevrolet Cavalier, N/A
• Fits 2000-2002 Pontiac Sunfire, N/A
• Fits 2000-2001 Chevrolet Lumina, N/A

Quality Assurance

Delphi builds aftermarket parts using OE heritage and technical knowledge developed through long-term supplier experience with leading automakers. The FP10300 reflects that approach with application-specific construction and a fixed-pressure design for regulated fuel delivery service.