Here's a general outline. Specific steps and locations may vary slightly depending on the engine and trim level of your Skylark. Always consult a repair manual specific to your vehicle's year, make, and model for detailed instructions and diagrams. A Haynes or Chilton manual would be a great investment.
1. Preparation:
* Safety First: Disconnect the negative battery cable.
* Gather Tools: You'll need jack stands, a jack, wrenches (various sizes), sockets, ratchet, screwdrivers (Phillips and flathead), fuel line disconnect tools, safety glasses, gloves, rags, and a new fuel pump (ensure it's the correct one for your Skylark's engine). A fuel pressure gauge can be helpful, but not strictly necessary.
* Locate the Fuel Pump: On most 1990 Skylarks, the fuel pump is located inside the fuel tank. This means you'll need to drop the tank.
* Relief Pressure: You may need to relieve fuel pressure in the fuel system. This often involves starting the car and letting it run until it stalls, after the pressure has been used, or using a fuel pressure relief valve (if equipped).
2. Dropping the Fuel Tank:
* Raise the Vehicle: Securely jack up the rear of the vehicle and place it on jack stands.
* Disconnect Fuel Lines: Carefully disconnect the fuel lines from the fuel pump module. Use fuel line disconnect tools to avoid damaging the lines. Have rags ready to soak up any spilled fuel.
* Disconnect Electrical Connections: Disconnect the electrical connector to the fuel pump.
* Disconnect Tank Straps/Support: Locate and detach the straps or supports holding the fuel tank in place. These are usually bolts or clips.
* Lower the Fuel Tank: Carefully lower the fuel tank. It may be heavy and contain fuel, so proceed slowly and cautiously. You might need to support the tank with a strap or rope to prevent it from swinging and damaging the fuel lines.
3. Replacing the Fuel Pump:
* Access the Fuel Pump: The fuel pump is usually part of a larger assembly (fuel pump module) within the tank. You may need to remove the access panel or the entire assembly from the tank. This often involves removing retaining clips or bolts.
* Remove the Old Pump: Carefully remove the old fuel pump from the module. Take note of the orientation and any gaskets or seals.
* Install the New Pump: Install the new fuel pump, making sure it's oriented correctly and any gaskets or seals are properly installed.
* Reassemble the Module: Carefully reassemble the fuel pump module.
4. Reinstallation:
* Raise the Fuel Tank: Carefully raise the fuel tank back into position.
* Reconnect Fuel Lines and Electrical Connections: Securely reconnect the fuel lines and electrical connections. Double-check to ensure everything is properly connected and secured.
* Reconnect Tank Straps/Supports: Securely reattach the tank straps or supports.
* Lower the Vehicle: Carefully lower the vehicle from the jack stands.
* Reconnect the Battery: Reconnect the negative battery cable.
5. Testing:
* Start the Engine: Start the engine and listen for any unusual noises from the fuel pump. Check for leaks.
Important Considerations:
* Fuel Safety: Fuel is extremely flammable. Work in a well-ventilated area, away from open flames or sparks. Use caution when handling fuel lines.
* Cleanliness: Keep the area clean to prevent debris from entering the fuel system.
* Repair Manual: Consult a repair manual for your specific vehicle model for detailed instructions, torque specifications, and diagrams. This is crucial for a successful repair.
This is a general overview; details will vary depending on your specific Skylark model. If you're not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Improper installation could lead to serious problems.
