1998 Buick Regal Change the Fuel Filter
Buick Regals came equipped with a one-piece fuel sending unit, an in-tank fuel pump and a fuel filter for the 1998 model year. Debris and small particulates that could foul the injectors are removed by the fine screen of the filter. Fuel filters may be cleaned with solvent and compressed air, but if they become too dirty, they must be replaced. Symptoms of a clogged fuel filter include poor performance, rough idle, hard starting, stumbling upon acceleration, engine misses, stalling and eventually a non-running condition.
 Tools Used
|Inside snap-ring pliers|
 Change the Fuel Filter
Relieve the Fuel Pressure
- Open the fuel door, then remove the fuel cap by hand.
- Locate the fuse box under the passenger side of the dashboard. Open the fuse box, then remove the fuel pump fuse with a fuse puller.
- Start the engine. Run the engine until it stalls from lack of fuel. Turn the engine over with the key for three seconds to finish purging the fuel system.
- Open the hood, then remove the battery's negative cable with a wrench.
Fuel Filter Access
- Open the trunk. Pull the bottom liner free from the trunk by hand, then remove it fully from the vehicle.
- Remove seven nuts holding down the fuel pump access cover, using a wrench. Lift the cover up and off the cover studs.
- Remove the fuel pump retainer with a pair of inside snap-ring pliers. Carefully lift the pump assembly out of the tank. Use caution when handling the pump assembly, as the float and float arm are delicate and can be easily damaged.
- Carefully pry the fuel filter off the pump intake nipple, using a flat screwdriver.
- Install the new fuel filter onto the pump intake nipple.
- Reverse the disassemble steps to reassemble the fuel filter on the Regal.
 Tips & Warnings
- If you are replacing the fuel filter as part of troubleshooting a fuel delivery problem, inspect the fuel pump fuse after removing from the fuse box. Inspect the fuse through its sight window to see if it is blown. The conductor in the fuse sight window will be burned if the fuse is blown. Replace the fuse if it is blown and test the vehicle before replacing the fuel filter.
- Use caution when working on a gasoline fuel system. Perform all operations in a well-ventilated area, away from enclosed spaces or pilot lights (such as on a natural gas water heater). Use caution when using steel tools on the fuel system, as a spark could ignite gas fumes and cause an explosion.
- If your Buick Regal is equipped with a Theft-lock system, disable the lockout feature before disconnecting the battery cable.