Delphi FP10389 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE Fitment

The Delphi FP10389 fuel injection pressure regulator is built for precise fuel system control in select Chevrolet Colorado, GMC Canyon, and Isuzu i-280 applications. With OE heritage behind the design, this metal regulator supports stable fuel pressure for consistent injector performance and drivability.

Key Features

• Fuel injection pressure regulator for air and fuel delivery systems
• Metal construction for durable service in the fuel system
• Push-in inlet and outlet connections for direct replacement fitment
• 1 inlet and 1 outlet port with bolt-on mounting
• Fixed 55 system pressure specification
• No gauge port and non-adjustable design
• Fits 2004-2005 Chevrolet Colorado, N/A
• Fits 2004-2005 GMC Canyon, N/A
• Fits 2006 Isuzu i-280, N/A

Detailed Description

Delphi FP10389 is a fuel injection pressure regulator engineered for vehicles that require a 55-pressure fuel system setup. The metal body, push-in inlet and outlet design, and bolt mounting style support a direct-service replacement approach for the listed Chevrolet Colorado, GMC Canyon, and Isuzu i-280 fitments. Delphi draws on more than a century of OE experience, and that background is reflected in the part’s construction and application focus. This part cross-references Gates 23077 for the same application.

Common Problems This Part Can Address

• Fuel pressure that is outside the specified operating range
• Rough idle caused by inconsistent fuel delivery
• Hard starting related to pressure regulation issues
• Fuel trim concerns tied to unstable injector supply pressure
• Driveability problems in 2004-2005 Chevrolet Colorado, 2004-2005 GMC Canyon, and 2006 Isuzu i-280 applications

Installation Notes and Tips

Verify the inlet and outlet port sizes, push-in connection style, and bolt-mount configuration before installation. Confirm the vehicle’s fuel system specification matches the 55-pressure rating and compare the original regulator to the Delphi FP10389 before replacement. Clean the surrounding fuel system area and inspect related seals, lines, and connectors during service.

Quality Assurance

Delphi builds aftermarket parts using OE knowledge and supplier experience developed with major automakers. The FP10389 is designed to reflect that OE-based approach for the listed applications.