Here's a general outline. Specific steps may vary slightly depending on your exact model and fuel system configuration. Always consult a repair manual specific to your 1987 Pontiac Firebird Formula for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
1. Preparation:
* Safety First: Disconnect the negative battery cable.
* Gather Tools: You'll need jack stands, jack, socket wrench set (metric), fuel line disconnect tool, new fuel pump (ensure it's the correct one for your engine), safety glasses, gloves, rags, possibly a fuel pressure gauge (to verify proper installation), and potentially a fuel pump installation kit (may contain new o-rings, gaskets, etc.).
* Drain the Fuel Tank (Recommended): Siphoning out as much fuel as possible reduces the risk of spills and makes the job cleaner.
* Locate the Fuel Pump: On most '87 Firebirds, the fuel pump is located inside the fuel tank. This requires dropping the tank.
2. Dropping the Fuel Tank:
* Disconnect Fuel Lines: Carefully disconnect the fuel lines. Use the fuel line disconnect tool to avoid damaging the lines. Have rags ready to absorb any spilled fuel. Be extremely careful not to spark near the fuel lines.
* Disconnect Electrical Connector: Disconnect the fuel pump electrical connector.
* Disconnect Fuel Tank Sender Unit (if applicable): This provides the fuel level reading to the gauge.
* Remove Fuel Tank Straps: Carefully remove the straps securing the fuel tank.
* Lower the Fuel Tank: Lower the fuel tank using a jack. You might need to support the tank with jack stands to prevent it from hanging completely.
3. Fuel Pump Replacement:
* Access the Fuel Pump: Once the tank is lowered, you should be able to access the fuel pump assembly. This is usually held in place by a retaining ring or bolts.
* Remove the Fuel Pump Assembly: Carefully remove the assembly. Pay attention to how it's assembled to reassemble it correctly.
* Install the New Fuel Pump: Install the new fuel pump, ensuring that all gaskets and seals are properly seated.
* Reassemble the Fuel Pump Assembly: Carefully reassemble the pump assembly, ensuring everything is properly secured.
4. Reinstallation:
* Raise the Fuel Tank: Carefully raise the fuel tank back into position.
* Reconnect Fuel Lines: Reconnect the fuel lines, ensuring they are securely fastened.
* Reconnect Electrical Connector: Reconnect the fuel pump electrical connector.
* Reconnect Fuel Tank Sender Unit (if applicable): Reconnect the fuel sender unit.
* Secure the Fuel Tank: Secure the fuel tank with the straps.
* Reconnect Battery: Reconnect the negative battery cable.
5. Testing:
* Prime the Fuel System: Some systems require priming the fuel system after installation. Consult your repair manual for the procedure.
* Check for Leaks: Check for any fuel leaks around the lines and connections.
* Start the Engine: Start the engine and check for proper operation.
* Fuel Pressure Test (Recommended): Check the fuel pressure to ensure it's within specifications.
Important Considerations:
* Fuel Pressure: Incorrect fuel pressure can damage your engine.
* Fuel System Safety: Fuel is highly flammable and dangerous. Take extreme precautions to prevent fires or explosions.
* Repair Manual: A repair manual specific to your vehicle is essential. Generic instructions may not be accurate for your specific model.
This is a general guide; the exact steps might vary. If you're not comfortable performing this repair, it's best to take your vehicle to a qualified mechanic. Incorrect installation can lead to serious problems, including engine damage or fire.
