Here's a general outline. This is NOT a comprehensive guide and should not be considered a substitute for a repair manual specific to your Oldsmobile model. Consult a repair manual for detailed instructions, diagrams, and torque specifications appropriate for your vehicle.
1. Safety First:
* Disconnect the negative battery terminal. This is crucial to prevent electrical shock and potential fire.
* Work in a well-ventilated area. Fuel vapors are flammable and harmful.
* Use appropriate safety glasses and gloves.
2. Preparation:
* Obtain the correct fuel pump for your Oldsmobile model. This is critical; using the wrong pump will damage your car. Cross-reference your vehicle's VIN to ensure you get the correct part.
* Gather the necessary tools: This will include sockets, wrenches (metric), screwdrivers, pliers, possibly a fuel line disconnect tool, a fuel pump removal tool (may or may not be necessary), jack stands, and possibly a fuel pressure gauge.
* Consult a repair manual: This is essential for your specific model. Diagrams are invaluable. Find one online or at an auto parts store.
3. Accessing the Fuel Pump:
* Lower the fuel tank: This usually involves loosening straps or bolts holding the tank in place. You might need to drain some or all of the fuel first (carefully; use a siphon pump). The method for doing this varies greatly between models. Your repair manual will show you the specific location of the tank access.
* Disconnect fuel lines: You'll need to disconnect the fuel lines leading to and from the fuel pump. Be extremely careful to avoid spilling fuel. Have rags handy to soak up any spills. Use the appropriate fuel line disconnect tool if necessary. Take note of how things are connected to reconnect correctly.
* Disconnect the electrical connector: Unplug the electrical connector to the fuel pump.
* Remove the fuel pump assembly: This may involve removing a retaining ring, bolts, or a special fuel pump removal tool. This step is highly model-specific.
4. Replacing the Fuel Pump:
* Install the new fuel pump: This is generally the reverse of the removal process. Ensure the new pump is seated correctly.
* Reconnect everything: Reconnect the electrical connector, the fuel lines (ensuring a tight seal!), and any other components removed.
* Raise the fuel tank: Secure the fuel tank back into its position.
* Reconnect the battery.
5. Testing:
* Check for leaks: Inspect all fuel lines and connections for any leaks.
* Start the car: Listen for any unusual sounds from the fuel pump.
* Monitor for proper operation: Check for smooth acceleration and performance.
Again, this is a highly simplified overview. You MUST consult a repair manual specific to your 1998 Oldsmobile model to complete this job safely and correctly. If you're not comfortable performing this repair, take your vehicle to a qualified mechanic. A poorly installed fuel pump can lead to serious problems, including fire.
