Before You Begin:
* Disconnect the battery: This is crucial to prevent electrical shorts and sparks. Disconnect both the positive (+) and negative (-) terminals.
* Safety Glasses and Gloves: Wear these to protect yourself from fuel, debris, and sharp edges.
* Jack Stands: Never work under a car supported only by a jack. Use jack stands for safety.
* Proper Ventilation: Work in a well-ventilated area to avoid inhaling fuel fumes.
* Fire Extinguisher: Have a fire extinguisher readily available.
* Consult a Repair Manual: A Haynes or Chilton repair manual specific to your 1998 Chevy Cavalier is highly recommended. It will provide detailed diagrams and instructions specific to your vehicle. This response is for general guidance only, and your car may have specific variations.
Steps (General Outline - Refer to your repair manual for precise details):
1. Lower the Fuel Tank: This is usually the most difficult part. You'll likely need to:
* Release Fuel Pressure: This is essential. Consult your repair manual for the specific procedure, but it often involves running the engine until it stalls after disconnecting the fuel pump relay.
* Access the Fuel Tank: This often involves removing various components such as the rear seat bottom (if applicable), access panels, and possibly the exhaust system components (depending on your model and the location of the fuel pump access).
* Disconnect Fuel Lines: Carefully disconnect the fuel lines (Inlet and Outlet) using fuel line disconnect tools or a very careful approach with pliers. Be prepared for some fuel spillage; use rags to soak it up immediately. Mark the lines to ensure correct reconnection.
* Disconnect Electrical Connectors: Disconnect the electrical connector from the fuel pump.
* Lower the Fuel Tank: Carefully lower the fuel tank, either by using straps or a fuel tank lowering tool. Support the tank to prevent damage.
2. Remove the Fuel Pump:
* Access the Fuel Pump: Once the tank is lowered sufficiently, you will see the fuel pump assembly.
* Remove the Fuel Pump Assembly: This often involves removing a retaining ring or a series of clips to access the pump assembly from the top of the fuel tank. Your repair manual will specify this procedure.
3. Install the New Fuel Pump:
* Install the Fuel Pump Assembly: Carefully install the new fuel pump assembly, ensuring it's seated correctly.
* Reconnect Electrical Connectors: Connect the electrical connector securely.
* Reconnect Fuel Lines: Connect the fuel lines, ensuring they are properly seated and secure. Double-check your markings.
4. Raise the Fuel Tank: Carefully raise the fuel tank back into place and secure it.
5. Reconnect Everything: Reconnect all the components you removed to access the fuel tank.
6. Reconnect the Battery: Reconnect the battery terminals.
7. Prime the Fuel System: This might involve turning the ignition key on and off several times (without cranking the engine) to allow the pump to fill the lines. Your repair manual should detail this step.
8. Test: Start the engine and check for leaks. Listen for the fuel pump to run when the ignition is turned on.
Important Considerations:
* Fuel Tank Safety: Be extremely cautious when working around the fuel tank. Avoid sparks and open flames.
* Fuel Line Clamps: Replace any fuel line clamps that look worn or damaged.
* Fuel Filter: Consider replacing the fuel filter while you're at it. It's a relatively easy job and will help ensure the longevity of your new fuel pump.
Disclaimer: This information is for general guidance only. Improper repair can result in damage to your vehicle or serious injury. Refer to your vehicle's repair manual for specific instructions and safety precautions. If you are not comfortable performing this repair, take your vehicle to a qualified mechanic.
