Here's a general outline. Specific steps and tools may vary slightly depending on your exact Corsica model and engine. Always consult a repair manual specific to your vehicle's year and engine for the most accurate and detailed instructions.
Safety First!
* Disconnect the negative battery terminal before starting any work. This prevents accidental sparks.
* Work in a well-ventilated area. Fuel fumes are flammable and hazardous.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
Tools You'll Likely Need:
* Jack and jack stands (crucial for safety)
* Socket set (various sizes)
* Wrenches (various sizes)
* Fuel line disconnect tools
* New fuel pump (ensure it's the correct one for your engine)
* Fuel pump installation kit (often includes new seals and gaskets)
* Shop rags
* Safety glasses
* Gloves
* Torque wrench (recommended)
* Possibly a fuel pressure gauge (to test after installation)
General Steps:
1. Prepare the Vehicle: Jack up the car securely and support it with jack stands. Locate the fuel pump access panel (usually under the rear seat or in the trunk).
2. Access the Fuel Pump: This often involves removing the rear seat or parts of the interior trim to access the fuel tank. Refer to your repair manual for specifics. You may need to remove the fuel tank access panel or even drop the fuel tank itself.
3. Disconnect the Fuel Lines: This is crucial and potentially messy. Use fuel line disconnect tools to carefully separate the fuel supply and return lines. Have rags ready to absorb any spilled fuel. You might need to relieve fuel pressure in the system; consult your repair manual for proper procedure.
4. Disconnect Electrical Connections: Disconnect the electrical connector from the fuel pump.
5. Remove the Fuel Pump: The fuel pump is typically housed in a module that's secured to the top of the fuel tank. You may need to remove retaining clips or bolts to access and remove this assembly.
6. Install the New Fuel Pump: Carefully install the new fuel pump into the module, ensuring the seals are properly seated. Reinstall the module and tighten it securely.
7. Reconnect Everything: Reconnect the electrical connector and the fuel lines. Double-check all connections for security.
8. Lower the Fuel Tank (if removed): Carefully lower the fuel tank back into its position, if you had to remove it.
9. Reconnect the Battery: Connect the negative battery terminal.
10. Test the System: Turn the ignition key to the "ON" position (don't crank the engine). Listen for the fuel pump to prime; you should hear a brief whirring sound. Start the engine and let it run for a few minutes to verify proper operation. Check for leaks around all fuel connections.
Important Considerations:
* Fuel Pressure: Some fuel systems require a certain fuel pressure. You might need a fuel pressure gauge to check this after installation.
* Repair Manual: A repair manual specific to your 1990 Chevy Corsica is essential. It provides detailed diagrams, torque specifications, and other crucial information not included here.
* Fuel Tank Safety: If you're dropping the fuel tank, be extra careful handling it; it's heavy and contains flammable fuel.
This is a simplified overview. The actual process can be significantly more involved. Again, strongly consider seeking professional help if you're not comfortable with automotive repairs. Improper fuel system work can be extremely dangerous.
