Delphi FP10377 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE Applications

The Delphi FP10377 fuel injection pressure regulator is built for returnless fuel systems that need stable pressure control and consistent fuel delivery. With OE heritage behind the design, it is a direct-fit service part for a wide range of Mercedes-Benz, Porsche, Buick, Chevrolet, Pontiac, Oldsmobile, and related applications.

Compatible With 1992-2005 Mercedes-Benz, 1994-2005 Porsche, and select Buick, Chevrolet, Pontiac, and Oldsmobile models, the FP10377 supports accurate fuel pressure regulation in systems that use a push-in inlet and clamp mounting.

Key Features

• Delphi FP10377 fuel injection pressure regulator for returnless fuel systems
• Metal construction for service durability
• Push-in inlet with 0.94 in. / 24.0 mm inlet port diameter
• Single inlet and single outlet layout
• Clamp-style mounting for OE-style installation
• No gauge port and non-adjustable design
• Returnless outlet type for the listed applications

Application Details

This fuel injection pressure regulator is used in OE-style fuel delivery systems where pressure must remain within a controlled range for proper injector operation. Delphi draws on more than a century of OE experience, and that background is reflected in the FP10377 service part design for vehicles such as the Mercedes-Benz SL500, Porsche 911, and Buick Park Avenue. The FP10377 is also cross-referenced with Gates 22855 and 22887 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 injector pressure
• Fuel odor or drivability concerns tied to regulator wear
• Loss of performance under load from poor pressure control

Installation Notes

Verify the inlet diameter, push-in connection, clamp mounting style, and returnless outlet configuration before installation. Confirm vehicle-specific fitment for the exact year and model, including Mercedes-Benz C230, E320, S500, and Porsche Boxster applications. Replace the regulator only after checking the fuel system for contamination, damaged seals, or restricted lines that could affect pressure control.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and engineering knowledge developed through long-term supplier relationships with major automakers. The FP10377 is made as a metal fuel pressure regulator for service use in the listed applications and is supported by Delphi’s OE-focused manufacturing background.