Delphi FP10521 Fuel Injection Pressure Regulator

Fuel Pressure Control for Porsche 944

The Delphi FP10521 fuel injection pressure regulator is built for precise fuel pressure control in compatible Porsche 944 applications. With a metal body, hose inlet, and bolt outlet, it matches the connection style used on select 1987-1989 Porsche 944 models.

Delphi draws on OE engineering experience and supplier knowledge from decades of original-equipment development, bringing that heritage into this aftermarket fuel injection pressure regulator.

Key Features

• Metal construction for fuel system durability
• Hose inlet and bolt outlet for application-specific routing
• 1 inlet and 1 outlet configuration
• No adjustable setting for factory-style pressure control
• No gauge port
• Delphi FP10521 replacement for select Porsche 944 fuel systems

Detailed Description

The Delphi FP10521 is a fuel injection pressure regulator for select Porsche 944 models, including 1987-1988 Porsche 944 and 1989 Porsche 944 to engine 46K 02979 and to engine 46K 61255. It is engineered with a metal housing and the correct hose-inlet, bolt-outlet layout to support proper fuel pressure regulation in the injection system. This part cross-references Dorman - OE Solutions 800-179 for the same application.

Use Delphi FP10521 when replacing a worn or leaking regulator on a Porsche 944 fuel injection system. The part number FP10521 is also a useful reference when verifying the correct fuel injection pressure regulator for Porsche 944 service work.

Common Issues This Part May Address

• Fuel pressure that is too high or too low at the injection rail
• Hard starting caused by inconsistent fuel delivery pressure
• Rough idle related to unstable fuel pressure regulation
• Fuel odor or leakage from a failing regulator body or connection point
• Driveability problems tied to incorrect fuel mixture control

Installation Notes and Tips

Confirm the engine number before ordering, since 1989 Porsche 944 coverage is limited to specific engine ranges. Verify the hose inlet and bolt outlet configuration against the original regulator before installation. Inspect fuel lines, seals, and mounting points for wear during replacement to help ensure a proper repair.

Quality Assurance

Delphi builds this part using OE experience and original-equipment development knowledge gained from supplying major automakers. That background supports consistent fit and function for FP10521 in the specified Porsche 944 applications.