Delphi FP10259 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE-Style Performance

The Delphi FP10259 fuel injection pressure regulator is built for precise fuel system control in select GM applications. It uses a metal body, a push-in inlet, and a threaded outlet to support stable fuel pressure at 44 PSI for consistent injector operation.

Compatible With 1999-2002 Chevrolet Cavalier, 1999-2002 Pontiac Sunfire, 1999-2001 Oldsmobile Alero, 2000-2001 Pontiac Grand Am, and 1999 Chevrolet Malibu applications. This part cross-references Standard Ignition (e.g., PR126, PR254) for the same application.

Key Features

• Delphi FP10259 fuel injection pressure regulator
• Metal construction for fuel system durability
• Push-in inlet and threaded outlet for the listed applications
• Single inlet and single outlet design
• Bolt-mount installation style
• Fixed-pressure regulator with 44 PSI system pressure
• No gauge port and non-adjustable design

Detailed Description

Delphi FP10259 is a fuel injection pressure regulator engineered for vehicles that require controlled fuel delivery at a 44 PSI system pressure. Delphi draws on more than a century of OE experience and supplier knowledge, and that background is reflected in the fit, materials, and application-specific design of this regulator. The metal housing, push-in inlet, and threaded outlet support direct replacement use in the listed Chevrolet, Pontiac, and Oldsmobile models. Search terms such as Delphi FP10259 fuel pressure regulator, 1999-2002 Chevrolet Cavalier fuel injection pressure regulator, and 2000-2001 Pontiac Grand Am fuel regulator align with this application.

Common Issues This Part Addresses

• 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 trim problems tied to regulator wear
• Driveability concerns in the listed GM applications

Installation Notes and Tips

Verify the inlet and outlet port style before installation: this regulator uses a push-in inlet, a threaded outlet, and a bolt-mount design. Confirm the vehicle application and pressure specification match the original part, especially on the 1999 Pontiac Grand Am 2nd Design with 53 PSI note, which uses a different calibration than the 44 PSI regulator listed here.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and application knowledge developed through long-term supplier experience with major automakers. That background supports consistent fitment and fuel pressure control for the specified vehicles.