Delphi FP10526 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE-Style Performance

The Delphi FP10526 fuel injection pressure regulator is built for precise fuel system control in select Ford and Mazda applications. With OE heritage behind the design, it supports stable fuel pressure for consistent drivability and injector performance.

Compatible with 1990-1991 Ford Ranger, 1990 Ford Bronco II, and 1991 Mazda Navajo applications, this regulator is a direct-fit service part for vehicles using a 41 psi system pressure specification.

Key Features

• Delphi FP10526 fuel injection pressure regulator
• Metal construction for fuel system durability
• 41 psi system pressure specification
• Push-in inlet and hose outlet design
• Bolt-on mounting style
• No gauge port and non-adjustable design
• OE-based engineering from a supplier with long-standing automaker experience

Detailed Description

The Delphi FP10526 is a fuel injection pressure regulator designed to maintain the correct fuel pressure at the rail or delivery point, helping the engine receive fuel at the expected pressure level. It features a 1 inlet and 1 outlet layout, a 0.43 in (11.0 mm) inlet port diameter, and a 0.35 in (9.0 mm) outlet port diameter. The push-in inlet, hose outlet, and bolt mounting configuration support service replacement on the listed Ford Ranger, Ford Bronco II, and Mazda Navajo applications. This part cross-references Dorman OE Solutions 800-156 for the same application.

What It Helps Address

• Fuel pressure that is too high or too low
• Hard starting caused by unstable fuel delivery
• Rough idle related to inconsistent rail pressure
• Fuel mixture issues tied to regulator wear
• Poor throttle response from incorrect fuel pressure control

Installation Notes and Tips

Verify the vehicle’s fuel system layout before installation, including the vacuum hose-on-side configuration and quick disconnect fittings where listed. Confirm port sizes, mounting style, and the 41 psi system pressure requirement before replacing the original regulator. Use clean fuel system practices during service to help prevent contamination in the regulator or connected lines.

Quality Assurance

Delphi builds this regulator using OE-focused engineering informed by more than 100 years of original equipment experience. That background supports consistent fit and function for maintenance on select Ford Ranger, Ford Bronco II, and Mazda Navajo fuel systems.