Here's a general outline of the process. This is NOT a comprehensive guide, and specific steps may vary slightly. Always consult a repair manual specific to your 1993 Buick Riviera for detailed instructions, diagrams, and torque specifications. A Haynes or Chilton manual would be a good investment.
1. Safety Precautions:
* Disconnect the negative battery terminal. This is crucial to prevent sparks and potential fires.
* Allow fuel pressure to release. There are several ways to do this, and your repair manual will detail the best method for your car. It may involve using a fuel pressure release tool or cycling the ignition switch several times.
* Work in a well-ventilated area. Fuel vapors are flammable and harmful.
* Wear safety glasses and gloves.
* Have proper jack stands and safety ramps. Never work under a car supported only by a jack.
2. Accessing the Fuel Pump:
* Lower the fuel tank. This is typically the most challenging part. You'll likely need to:
* Access the fuel tank straps. These are usually located on the sides or bottom of the tank.
* Carefully loosen and remove the straps.
* Support the fuel tank with jack stands or a suitable support to prevent it from falling. The tank is heavy and contains fuel.
* You might need to remove other components to gain access (exhaust components, etc.). Your repair manual will guide you here.
3. Removing the Fuel Pump:
* Disconnect the fuel lines. This involves carefully disconnecting the fuel feed and return lines. You'll likely need fuel line disconnect tools to prevent leaks and damage to the lines. Be prepared for some fuel spillage; have absorbent material ready.
* Disconnect the electrical connector. This connects the fuel pump to the car's electrical system.
* Remove the fuel pump access cover. This is usually a cover on the top of the fuel tank.
* Remove the fuel pump assembly. This involves carefully removing the pump from the tank. The assembly is typically held in place by a retaining ring or a similar fastener.
4. Installing the New Fuel Pump:
* Install the new fuel pump assembly. This is generally the reverse of the removal process.
* Connect the electrical connector.
* Connect the fuel lines. Ensure a tight connection to prevent leaks.
* Replace the fuel pump access cover.
* Raise the fuel tank. Securely fasten the fuel tank straps.
5. Testing and Final Steps:
* Reconnect the negative battery terminal.
* Check for fuel leaks. Carefully inspect all connections for leaks.
* Start the engine and check for proper operation. Listen for the fuel pump to prime when you turn the ignition key. Watch for any issues with the engine running.
Important Considerations:
* Fuel pump replacement kits: Often, these kits contain the pump, filter, and other necessary parts.
* Fuel tank sending unit: In some cases, the fuel level sending unit is integrated into the fuel pump assembly. If this is the case, you may need to replace the entire assembly.
* Professional help: If you are not comfortable performing this repair, it is highly recommended to take your car to a qualified mechanic. Working with the fuel system incorrectly can be dangerous.
This information is for general guidance only. Always consult a repair manual specific to your 1993 Buick Riviera before attempting this repair. Improperly performing this repair could result in injury or damage to your vehicle.
