Delphi FP10511 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE-Style Repair

The Delphi FP10511 fuel injection pressure regulator is built for precise fuel system control in select GM applications. With metal construction, push-in inlet and outlet connections, and a 51 system pressure rating, it supports stable fuel delivery for vehicles that need accurate pressure regulation.

Compatible with 1985-1988 Buick Century, 1986-1988 Buick LeSabre, 1985-1988 Oldsmobile Cutlass Ciera, 1987-1988 Oldsmobile Cutlass Cruiser, 1986-1988 Oldsmobile Delta 88, 1987-1988 Pontiac Bonneville, 1985-1987 Buick Regal, 1985-1987 Buick Riviera, 1985-1987 Oldsmobile 98, and 1986-1987 Oldsmobile Toronado.

• Delphi FP10511 fuel injection pressure regulator
• Metal body construction for fuel system service
• Push-in inlet and outlet ports
• 1 inlet and 1 outlet port configuration
• Bolt-on mounting type
• No gauge port and non-adjustable design
• System pressure rating: 51

Detailed Product Overview

Delphi builds this fuel injection pressure regulator using OE heritage and decades of supplier experience with major automakers. The FP10511 is engineered for applications that require consistent fuel pressure control at the regulator, helping maintain proper injector operation in the fuel injection system. This part number, FP10511, is listed for multiple Buick, Oldsmobile, and Pontiac models from the mid-1980s, including Buick Regal and Oldsmobile 98 applications.

This part cross-references Standard Ignition (e.g., PR3, PR100) for the same application.

Common Repair Symptoms

• Fuel pressure that is out of specification
• Hard starting related to fuel delivery imbalance
• Rough idle caused by unstable regulator performance
• Fuel odor or rich-running conditions tied to pressure control issues
• Driveability problems on Buick Regal, Buick Century, and Pontiac Bonneville fuel injection systems

Installation Notes and Tips

Verify the inlet and outlet port size, push-in connection style, and bolt-mount layout before installation. Confirm the vehicle’s fuel system pressure requirement matches the 51 rating and compare the original regulator to FP10511 for port orientation and mounting alignment. Clean the surrounding fuel system area before service and inspect related fuel lines and seals during replacement.

Quality Assurance

Delphi draws on OE supplier experience and original-equipment knowledge in the design of this aftermarket fuel injection pressure regulator. The FP10511 is built to meet the needs of listed Buick, Oldsmobile, and Pontiac applications with the same fitment and pressure-control requirements.