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How to Replace a 1993 Buick Century Fuel Pump

The Buick Century is a mid-size car manufactured by the Buick division of General Motors. The 1993 model belongs to the fifth generation of the Century, produced from 1982 to 1996. The engine in a 1993 Buick Century may be a four-cylinder 2.2L engine or a six-cylinder 3.3L engine. Both of these engines use fuel injection, requiring a high-pressure fuel pump. The fuel pump in the 1993 Buick Century attaches to the fuel tank, which you must remove in order to replace the fuel pump.

Instructions

1

Loosen the filler cap of the fuel tank and raise the the vehicle on jack stands. Disconnect the electrical connector from the fuel pump and lower the vehicle. Start the engine and allow it to run until the engine stalls. Crank the engine for three seconds to consume any remaining fuel in the fuel lines.

2

Disconnect the cable for the negative battery terminal with a socket wrench. Raise the vehicle on jack stands and drain the fuel tank. Detach the electrical wiring from the fuel tank, including the ground wire under the body of the vehicle. Disconnect the fuel lines from the fuel tank. Support the fuel tank with a jack stand and remove the nuts on the fuel tanks retaining strap with a socket wrench. Lower the fuel tank with the jack stand and remove it from the vehicle.

3

Disconnect the fuel filter from the fuel pump by twisting it and pulling it off the fuel pump. Discard the fuel filter. Detach the electrical connector for the fuel sending unit and remove the fuel sending unit from the fuel tank. Pull the fuel pump from its mounting bracket on the fuel sending unit.

4

Install the new fuel pump onto the fuel sender assembly between the mounting bracket and the pulsator. Connect the electrical connector for the fuel sender assembly. Place the fuel filter into position on the fuel pump and push the fuel filter until it is fully seated.

5

Install the fuel sending unit onto the fuel tank and connect the fuel tank. Check the fuel system for leaks and connect the battery cable to the negative terminal of the battery with a socket wrench.