Delphi FP10540 Fuel Injection Pressure Regulator

Fuel Pressure Control for Select Hyundai and Kia Models

The Delphi FP10540 fuel injection pressure regulator is built for precise fuel system control in select Hyundai and Kia applications. It uses a metal body, a push-in inlet, and a hose outlet to support stable fuel pressure in the fuel injection system.

Key Features

• Metal construction for fuel system durability
• Fixed-pressure design with a 50 system pressure rating
• 1 push-in inlet and 1 hose outlet for direct fuel line routing
• Clamp mounting type for secure installation
• No gauge port and no adjustability
• Inlet port diameter: 13.0 mm (0.51 in)
• Outlet port diameter: 8.0 mm (0.31 in)

Detailed Description

Delphi FP10540 is a fuel injection pressure regulator engineered for consistent fuel delivery control in vehicles that use a 50-pressure fuel system. Delphi draws on OE heritage and decades of original-equipment experience, bringing that background into aftermarket fuel system components. This part cross-references Beck/Arnley 158-0757 for the same application. It is a direct-fit style regulator for select Hyundai Elantra, Hyundai Tiburon, Kia Spectra, and Kia Spectra5 applications, including Fits 2001-2007 Hyundai Elantra, Fits 2003-2008 Hyundai Tiburon, Fits 2004-2009 Kia Spectra, and Fits 2005-2009 Kia Spectra5. The Delphi FP10540 is also listed for a 2003 Hyundai Tiburon fuel tank application.

What This Part 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 trim issues tied to pressure regulation problems
• Driveability concerns in Hyundai Elantra, Hyundai Tiburon, Kia Spectra, and Kia Spectra5 models

Installation Notes and Tips

Verify inlet and outlet port sizes before installation: 13.0 mm inlet and 8.0 mm outlet. Confirm the vehicle uses a clamp-mounted regulator with a push-in inlet and hose outlet, and match the application to the fuel tank location when servicing the 2003 Hyundai Tiburon note. Always inspect fuel lines, clamps, and sealing surfaces during replacement.

Quality Assurance

Delphi builds this regulator with OE-based engineering knowledge developed through supply relationships with major automakers. That OE background is reflected in the part’s materials, port design, and fixed-pressure fuel control approach.