Delphi FP10420 Fuel Injection Pressure Regulator

Fuel Pressure Control for OE-Style Performance

The Delphi FP10420 fuel injection pressure regulator is built for precise fuel system control in select Kia and Mazda applications. With a metal body, push-in inlet, hose outlet, and 44 psi system pressure, it supports stable fuel delivery for drivability and fuel metering consistency.

Key Features

• Delphi FP10420 fuel injection pressure regulator for select fuel injection systems
• Metal construction for durable underhood service
• Push-in inlet with hose outlet for the specified fuel line layout
• Fixed-pressure design rated at 44 psi
• Bolt-mount installation style
• No gauge port and non-adjustable configuration
• Fits 1995-1997 Kia Sephia, N/A
• Fits 1989-1994 Mazda MPV, N/A
• Fits 1990-1993 Mazda B2200, N/A
• Fits 1989-1993 Mazda B2600, N/A

Detailed Description

Delphi FP10420 is a fuel injection pressure regulator engineered for vehicles that require a 44 psi system pressure and a direct-fit mounting layout. Delphi draws on OE supplier experience to build aftermarket parts with the same application knowledge used in original equipment development. This regulator is a practical choice for restoring fuel pressure control on a 1995-1997 Kia Sephia or on select 1989-1994 Mazda MPV, 1990-1993 Mazda B2200, and 1989-1993 Mazda B2600 applications. This part cross-references Standard Ignition (e.g., PR65, PR475) for the same application.

Common Issues It May Address

• Fuel pressure that is outside the specified range
• Hard starting caused by inconsistent fuel delivery
• Rough idle related to unstable injector pressure
• Fuel mixture problems tied to regulator wear
• Driveability concerns in aging fuel injection systems

Installation Notes and Tips

Confirm the inlet and outlet sizes before installation: the inlet measures 11.0 mm (0.43 in) and uses a push-in connection, while the outlet measures 8.0 mm (0.31 in) and uses a hose connection. Verify the mounting style and system pressure specification against the vehicle’s fuel system requirements before replacement. Use clean fuel line practices and inspect surrounding hoses and fittings for wear during service.

Quality Assurance

Delphi builds this regulator with OE heritage and application knowledge developed through long-term supplier experience with major automakers. That background supports consistent fitment and fuel system specification matching for the listed Kia and Mazda vehicles.