Delphi MF0004 Mechanical Fuel Pump

Mechanical Fuel Pump for GM 3-Line Applications

The Delphi MF0004 mechanical fuel pump is a standard replacement for select gasoline-powered Chevrolet and GMC trucks and SUVs with a 3-line pump setup. Built from Delphi’s OE heritage and aftermarket engineering experience, it is specified for 9 psi system pressure and 40 average flow rating applications.

Key Features

• Mechanical fuel pump for gasoline applications
• Standard replacement design for select GM 3-line pump vehicles
• 9 psi system pressure specification
• 40 average flow rating
• Hose bead inlet with threaded outlet connection
• Gasket and instruction sheet included
• Delphi part number MF0004

Detailed Description

Delphi MF0004 is a mechanical fuel pump engineered for older Chevrolet and GMC fuel delivery systems that use a 3-line pump configuration. It features a 0.375-inch inlet outside diameter, two outlets, and a 5/8-18 UNF threaded outlet fitting size. This part is built for direct replacement use on select Chevrolet K10, K20, K30, K5 Blazer, K10 Suburban, K20 Suburban, R30, C10, C20, C30, and GMC Jimmy, K1500, K2500, K3500, V3500, and related models listed in the fitment data. This part cross-references Airtex Fuel Pumps 41378 for the same application.

What It Helps Fix

• Hard starting caused by low fuel delivery
• Fuel starvation under load
• Engine stalling from weak mechanical pump output
• Inconsistent fuel pressure in carbureted systems
• Fuel supply issues on 3-line pump-equipped GM trucks and SUVs

Installation Notes and Tips

Verify that the vehicle uses a 3-line pump before ordering. Fitment includes 1978-1988 Chevrolet and GMC applications with notes such as I.D. # 41378, Ryder Truck option, and short housing on certain models. Confirm the outlet thread size, inlet style, and fuel line routing against the original pump before installation. Use the included gasket during assembly and follow the instruction sheet for proper mounting and connection alignment. Compatible With 1988 Chevrolet R30, 1987-1988 Chevrolet V30, 1987-1988 GMC V3500, and other listed GM truck and SUV applications.

Quality Assurance

Delphi draws on more than a century of OE experience and supplier knowledge from work with major automakers. That OE background is reflected in the MF0004 mechanical fuel pump’s replacement-focused design and application coverage for select Chevrolet and GMC models. Delphi MF0004 is also listed with interchange references including Carter M60039 and Spectra Premium SP1007MP.