; Fuel Pumps & Lines - You Auto Know - Auto Kruser's Auto Repair and Service

How Your Vehicle Works

Fuel Pumps & Lines









The fuel pump sends fuel to the engine's fuel injectors or carburetor. The quantity of fuel delivered is metered automatically in direct proportion to the amount of fuel dispensed into the engine by the injectors or carburetor.

The fuel pump consists of an upper and lower assembly. The upper assembly accommodates an inlet and outlet valve, and a fuel filter. The lower assembly contains the actuating plunger. Located between both assemblies is a diaphragm and diaphragm spring. The diaphragm is built up of several layers of a fuel-proof material, and is sandwiched between two supporting discs which are riveted to the plunger coupling; the diaphragm also acts as a gasket.

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