MF0025 Delphi Fuel Pump, Mechanical
Click the image to expand

Delphi Fuel Pump, Mechanical | MF0025

Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac
Not Available
Not Available Information Icon
Not available to order or discontinued.
Loading...

Make Sure It Fits

P/N: MF0025 Delphi

The mechanical fuel pump delivers fuel to your engine’s carburetor to run the engine. The mechanical fuel pump is mounted to the engine and is run using a pushrod that transfers camshaft movement to raise and lower a diaphragm inside to pump fuel from the fuel tank up to the engine. Since the mechanical fuel pump uses camshaft motion and a pushrod to operate, it will only pump fuel while the engine is turning.

If the fuel pump diaphragm ruptures or the fuel pump arm sticks, the fuel pump will not pump gas to the engine and the engine will not run.

Signs of a Faulty Mechanical Fuel Pump
A lean running engine, engine stuttering, and engine stalling are all signs the mechanical fuel pump is beginning to fail. Either the diaphragm has a small hole or tear in it that prevents the pump from pumping all the needed fuel, or the pushrod lever is worn. If the diaphragm is completely torn or the pushrod shaft is completely worn or broken, the pump will not be able to supply any fuel and the engine will not run.

Replacing Your Vehicle’s Mechanical Fuel Pump
The mechanical fuel pump should be replaced anytime it cannot supply adequate fuel pressure to the carburetor to run the engine. A vacuum pump can be used to test the draw of the fuel pump while the engine is being cranked to determine how much vacuum is created. If the pump does not create a vacuum or the vacuum created is less than specified in the vehicle’s owner’s manual, the pump has failed or is failing.

Mechanical fuel pumps mounted to the side of the engine can usually be replaced in under an hour. However, make sure the mating surface to the engine is properly cleaned prior to installation of a new pump to prevent vacuum leaks that will prevent the pump from pumping all the fuel needed. Additionally, replacing the fuel filter inline before the pump will prevent fuel contaminants from damaging the diaphragm on your new mechanical fuel pump.

View more Delphi Mechanical Fuel Pumps.

Left = Driver side and Right = Passenger side.
All parts are priced individually unless identified as a set or kit. "Per car" notes identify how many of a given part your car has and "Left/Right or Front/Rear" notes means the part fits the left or right side of the car. These parts are still sold individually and you'll need to select the appropriate quantity if you plan to replace more than one of this item.

Why Buy OEM & Genuine Replacement Auto Parts from AutohausAZ?

Auto parts at wholesale prices is what you will find at AutohausAZ. Have you been searching the web for auto parts for your vehicle? You have come to the right place! Here at Autohaus, we strive to offer low prices on quality replacement parts and providing first rate customer service.

What This Delphi Fuel Pump, Mechanical Fits?

Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.

Buick
78-79 - Century Custom, Custom RWD, Limited, Limited RWD, Special & more
80-83 - Electra Limited, Park Avenue
84-84 - Electra Limited, Park Avenue
1st Design
81-83 - LeSabre Base, Custom, Limited, Limited Edition F/E, Sport
77-77 - LeSabre Custom, RWD
Late
78-79 - Regal Base, Limited, Limited RWD, RWD, Sport
77-77 - Regal Base, SR
Late
78-78 - Skylark Base, Custom, S, Sport
77-77 - Skylark Base, S, SR
Late
Cadillac
80-80 - DeVille Base, Cabriolet, d'Elegance
82-82 - Seville Base, Elegante
Chevrolet
81-84 - Caprice Classic Estate RWD, Classic Landau RWD, Classic RWD
82-82 - El Camino Conquista RWD, RWD, SS
81-83 - Impala Estate RWD, RWD
81-81 - Monte Carlo Landau RWD, RWD
ID #41209
GMC
79-83 - Caballero Amarillo RWD, Diablo RWD, Laredo RWD, RWD
Oldsmobile
81-82 - 98 Luxury, Regency, Regency Brougham
80-84 - Cutlass Calais
82-82 - Cutlass Cruiser
81-84 - Cutlass Supreme Base, Brougham, LS
80-84 - Delta 88 Base, Holiday, Royale, Royale Brougham, Royale Brougham LS
Pontiac
81-84 - Bonneville Base, Brougham, LE
81-81 - Catalina
80-81 - Firebird Base, Esprit, Formula
80-81 - Grand LeMans Base, RWD, Safari, Safari RWD
80-84 - Grand Prix Base, Brougham, LE, LJ
80-81 - LeMans Base, RWD, Safari, Safari RWD