Delphi MF0003 Mechanical Fuel Pump

Delphi MF0003 Mechanical Fuel Pump

The Delphi MF0003 mechanical fuel pump is a standard replacement for select Toyota fuel systems that use a gas application and external mounting. Built from Delphi’s OE-focused engineering background, it is specified for 4 psi system pressure and an average flow rating of 20 to support consistent fuel delivery in classic Toyota Pickup, 4Runner, Celica, and Corona applications.

Key Features

• Mechanical fuel pump for gas-powered applications
• 4 psi system pressure with 20 average flow rating
• Hose bead inlet and outlet connections for 0.250 in. lines
• Two outlet ports for the specified fuel system layout
• Gasket included for installation
• Standard replacement grade for select Toyota models
• Delphi MF0003 part number for direct reference

Product Details

Delphi MF0003 is a mechanical fuel pump engineered for external-mounted Toyota fuel delivery systems. It is listed for 1981-1990 Toyota Pickup, 1984 Toyota 4Runner, 1981-1983 Toyota Celica, and 1981-1982 Toyota Corona. The pump uses 0.250-inch inlet and outlet outside diameters with hose bead connections, and the package includes the pump, gasket, and instruction sheet. Delphi draws on long OE experience and a broad aftermarket portfolio, which is reflected in the fit, form, and application coverage of this replacement pump.

This part cross-references Airtex Fuel Pumps 1330 and Carter M60416 for the same application.

Common Replacement Reasons

• Hard starting caused by weak or inconsistent fuel delivery
• Fuel starvation under load in carbureted Toyota Pickup or 4Runner systems
• Low fuel pressure that affects drivability and throttle response
• Fuel leakage at an aging mechanical pump or gasket surface
• Restoration or maintenance of original-style fuel system operation

Installation Notes

Verify the vehicle’s external-mounted pump configuration before installation. Confirm the inlet and outlet hose size, line routing, and system pressure requirements match the existing fuel system. Replace the gasket during installation and follow the included instruction sheet for proper mounting and connection alignment. For Toyota Pickup, Celica, 4Runner, and Corona applications, confirm the model year and fuel system layout against the vehicle before final assembly.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and application knowledge developed through decades of supplying major automakers. The MF0003 is a standard replacement mechanical fuel pump intended to meet the specified fuel delivery requirements for the listed Toyota applications.