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The fuel filter on a 1985 Buick Century is designed so that gasoline flowing to the engine is free of harmful debris. The fuel pump, located inside the gas tank, has a built-in strainer. This keeps large debris from leaving the tank but smaller debris and sediment can get past the strainer. If not changed, the small debris will eventually clog the fuel filter; this can affect gas mileage and engine performance. Fuel filters should be changed annually or every 30,000 miles.

Instructions

Remove the Fuel Filter

1

Open the hood and locate the fuse panel. Open the fuse panel and locate the fuel pump relay. Pull it out by hand.

2

Start the engine and let it run. The engine will stall once the fuel system has depressurized. Turn off the engine and replace the relay back in to the fuse panel. Close the fuel panel.

3

Crawl under the car behind the driver-side rear wheel well and look for the fuel filter. The fuel filter is canister-shaped with a fuel line entering and exiting the filter; it will be in a mounting bracket on the frame rail. You can also trace the fuel line from the gas tank to find the fuel filter.

4

Place a drain pan under the fuel filter to catch any gas in the fuel lines or the fuel filter.

5

Disconnect the inlet fuel line from the fuel filter by pinching the tab on the quick-disconnect fitting and pull the fuel line off the fuel filter. If the fuel line is held on by a hose clamp, loosen the clamp with a screwdriver. Remove the outlet fuel line the same way.

6

Use a socket wrench to loosen the bolt on the mounting bracket and slide the fuel filter out of the bracket. Discard the fuel filter.

Install the Fuel Filter

7

Slide the new filter in the bracket. Make sure the arrow on the fuel filter is pointing toward the front of the car. The arrow designates the direction of fuel flow. Tighten the bracket bolt with the socket wrench. The fuel filter should be tight in the bracket.

8

Push the inlet fuel line onto the fuel filter until it clicks in place. If held on by hose clamps, push the fuel line over the fitting on the fuel filter. Slide the hose clamp over the hose and fitting and tighten it with a screw driver. Do the same for the outlet fuel line.

9

Start the engine and let it to run for at least 5 minutes.

10

Check the fuel filter and fuel lines to make sure there are no gas leaks.

The 1992 Buick Century is a mid-sized sedan. The 1992 Century was produced in two-door, four-door, and station wagon versions. The primary engine offered in the 1992 Century was a 2.5-liter four-cylinder, but a 3.3-liter V-6 was an option for all models. Lifting the 1992 Century and setting the jack stands requires attention to detail. If the jack stands are not set correctly, working on or around the car will be unsafe.

Instructions

Front

1

Park the car on a level surface. Place wheel chocks behind the rear tires of the Century. Use a tire iron to loosen the front wheel lug nuts a half turn if you are working on the brakes, steering, or suspension components. It is difficult to loosen lug nuts once the vehicle is on the jack stands.

2

Insert a floor jack underneath the front of the Century. Locate the frame rail that is parallel to the side of the engine. Make sure there is no severe rust or holes in the frame rail. If there is a large amount of rust or the frame rail has holes, move to the third section of this project for alternate instructions. If there is little to no rust place your jack beneath one of the frame rails.

3

Raise the car upward by the frame rail. Place your jack stand just rearward of the jack, underneath the front frame rail. The jack stand should be set where the lower control arm meets the frame rail. The lower control arm is a metal part that extends from the frame rail out toward the wheels. Lower the jack to let the car set on the jack stand.

4

Repeat Steps 2 and 3 to place the jack stand underneath the other front side of the Century.

Rear

5

Park the car on a level surface. Place wheel chocks in front of both front tires. Loosen the rear wheel lug nuts if you are planning on working on the brakes, suspension, or steering components.

6

Inspect the rear axle beam, which is the metal beam that extends between both rear wheels. If the rear axle beam is severely rusted or bent, proceed to the third section of this project for alternate instructions. If little or no rust is present, place your jack beneath the rear axle beam, just inward from the tire.

7

Raise the rear of the Century with the jack. If you are planing on getting beneath the car, you will need to raise the jack near-to its limit height. Place your jack stand just inward from the jack, underneath the axle beam. This will leave you room to access the area inward from the rear wheel if needed. Lower the jack to set the car onto the jack stand.

8

Repeat Steps 2 and 3 to set the jack stand beneath the other rear side of the Buick if needed.

If the Car is Rusted Severely

9

Loosen the front or rear lug nuts, if you are planning to work on the brakes, suspension, or steering components. Use a tire iron to loosen the nuts.

10

Locate the side chassis rails. The chassis rails run parallel to the sides of the car, and are located just inside the body pinch rails. Place your jack about 1 foot rearward from the front wheel well if you are working on the front of the car, underneath the chassis rail. If you are working on the back of the car place your jack beneath the chassis rail, about 1 foot forward of the rear wheel well.

11

Raise the Century with the jack underneath the chassis rail. Place your jack stand beneath the chassis rail, directly next to the jack. If you are working on the front of the car, the jack stands goes to the front of the jack. If you are working on the rear of the car, the jack stand goes to the rear of the jack. Lower the jack to set the Century down onto the jack stands.

12

Repeat Steps 2 and 3 if you need to raise the second side of the vehicle.

A 1999 Buick Century has a helpful computer system, like most modern vehicles, that lets you know about problems with the vehicle and when you need to service the engine. Perform the servicing soon after you see the Service Engine Soon light turn on. Make sure you have it serviced before you attempt to reset the light. If you dont reset it soon after you have your Buick Century serviced, the light will start to malfunction.

Instructions

1

Put the key into the ignition and turn it to "Run." Dont start the engine.

2

Press down slowly and fully on the gas pedal, then release it. Do this three times in five seconds.

3

Watch for the "Service Engine Soon" light to start blinking. This indicates that the system is resetting itself. Turn the ignition to "Off" and wait one minute.

4

Start the Centurys engine. The Service Engine Soon light will flash for a moment, then turn off. If it doesnt do this, repeat the process.