Delphi FP10550 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE-Style Repair

The Delphi FP10550 fuel injection pressure regulator is built for precise fuel system control in select Lexus and Toyota applications. With a metal body, push-in inlet and outlet, and a 44 psi system pressure rating, it supports stable fuel delivery for the 1997-2001 Lexus ES300 and 1997-1998 Toyota Camry with the specified fuel system configurations.

Key Features

• Metal construction for fuel system durability
• 44 psi system pressure specification
• Push-in inlet and outlet connections
• Bolt-mounted design
• No gauge port and non-adjustable configuration
• OE-focused engineering backed by Delphi’s aftermarket experience

Detailed Product Overview

Delphi FP10550 is a fuel injection pressure regulator made for direct replacement in select fuel-in-tank applications. It uses a single push-in inlet and single push-in outlet with 13.0 mm inlet diameter and 6.0 mm outlet diameter, matching the listed fuel system requirements for the application. This part cross-references Beck/Arnley 158-1170 and Dorman - OE Solutions 800-450 for the same application. Compatible vehicle coverage includes Fits 2000-2001 Lexus ES300, N/A; Fits 1997-1999 Lexus ES300, N/A; and Fits 1997-1998 Toyota Camry, N/A.

Common Issues This Part Can Address

• Fuel pressure that is too high or too low for the system
• Hard starting caused by unstable fuel delivery
• Rough idle related to inconsistent injector pressure
• Fuel trim problems tied to pressure regulation faults
• Driveability concerns in fuel-in-tank regulator applications

Installation Notes and Tips

Verify the vehicle’s fuel system type before ordering, since this regulator is listed for ES300 models with Type B or Aisan pump configurations and Camry models with Type B fuel systems. Confirm the inlet and outlet sizes, mounting style, and 44 psi specification against the original part before installation. For best results, inspect the surrounding fuel tank components and replace any worn seals or damaged lines during service.

Quality Assurance

Delphi draws on more than a century of OE experience and supplier knowledge from work with major automakers. That OE heritage is reflected in the FP10550’s materials, dimensions, and application-specific design for Lexus ES300 and Toyota Camry fuel system service.