How to Remove a Fuel Pump in a 1997 Mercury Grand Marquisby Gregory Crews
Removing the fuel pump in a Mercury Grand Marquis can be tricky as the tank sits below the vehicle and has an oblong shape. Once the straps are removed and out of the way, the fuel tank will come straight down. You can take the fuel pump out of the gas tank easier once the tank is on the ground and you have elbow room to pull the pump out of the top of the tank.
Raise the hood to access the engine compartment. Disconnect the negative terminal from the battery.
Locate the drain plug at the bottom of the fuel tank. Open the drain plug with a crescent wrench. Allow all the fuel to drain into a large drain pan. Tighten the plug when the tank is drained.
Raise the back end of the vehicle by placing a jack under the driver's side rear door. There is an indented spot that is braced for the weight of the car. Chock the front wheels to ensure the car does not roll while lifted. Set the parking brake.
Place a second jack under the fuel tank to prevent the tank from falling to the ground when the straps are removed. Ensure the jack is in the center of the tank.
Unbolt the two straps with a socket wrench. Place the straps out of the way once they are removed.
Rest the tank onto the jack. Lower the tank enough to access the fuel lines and electrical wires. Separate the fuel line from the top of the tank by pulling the tabs then pulling away from the piping that holds the line in place. Disconnect the electrical lines from the tank by pushing down on the locking tab at the connector and pulling off from the connecting harness.
Slide the tank out from underneath the car. Lower the car until you are ready to install the tank.
Twist off the cap at the top of the gas tank with a counterclockwise movement using a large set of channel locks. Place the cap to the side and discard the O-ring.
Lift up on the fuel pump assembly to pull it out of the tank. You may have to tilt the assembly to pull it out comfortably.
- When pulling the cap off the top of the fuel tank, you can also use a punch or a flat head screwdriver. Tap the end of the punch with a hammer, turning the cap in a counterclockwise direction.
Things You'll Need
- Jacks (2)
- Wheel chocks (2)
- Crescent wrench
- Drain pan
- Socket set
- Socket wrench
- Channel locks
- Hammer (optional)
- Flat head screwdriver (optional)
- Use extreme caution when working around gasoline as it is very toxic and flammable.
Gregory Crews has been in the film industry for three years and has appeared in more than 38 major motion pictures and 16 television shows. He also writes detailed automotive tutorials. His expertise in the automotive industry has given him the skills to write detailed technical instructional articles.