Steps (General, Consult Manual for Specifics):
1. Safety First: Disconnect the negative battery terminal. Fuel is highly flammable. Work in a well-ventilated area away from any ignition sources. Consider using safety glasses and gloves.
2. Prepare the Vehicle: Raise the rear of the vehicle securely using jack stands. Never work under a vehicle supported only by a jack.
3. Drain the Fuel Tank: This is crucial to minimize the amount of fuel you'll be working around. Use a siphon pump or carefully drain the fuel tank through the fuel line (after disconnecting it). Dispose of the fuel properly according to local regulations.
4. Disconnect Fuel Lines and Electrical Connections: Carefully disconnect the fuel lines to the tank. There will be at least one fuel feed line and one return line. You'll also need to disconnect the electrical connector to the fuel pump. Mark or photograph the connections to avoid confusion during reassembly. Consider using fuel line clamps to avoid spills during disconnection and reconnection.
5. Remove the Fuel Tank Straps: Most vehicles have straps securing the fuel tank. Locate and carefully remove these straps. They may be bolts or clips.
6. Lower the Fuel Tank: Carefully lower the fuel tank. You might need to support it with a jack or straps as you disconnect the last connections.
7. Access the Fuel Pump: Once the tank is lowered, you'll be able to access the fuel pump assembly. It's usually located at the top of the tank.
8. Remove and Replace the Fuel Pump: This usually involves removing a retaining ring or cover to access the fuel pump. Refer to your repair manual for the specific procedure. When replacing the pump, ensure you get the correct one for your vehicle.
9. Reassembly: Carefully reverse the above steps to reinstall the fuel pump, secure the tank, and reconnect the fuel lines and electrical connections.
10. Check for Leaks: After reassembly, check for any fuel leaks around the fuel lines and tank connections.
Important Considerations:
* Repair Manual: A repair manual specific to your 1998 Isuzu Hombre is absolutely essential. Generic instructions can be misleading and potentially dangerous.
* Fuel System Pressure: The fuel system may still be under pressure even with the negative battery terminal disconnected. Consult your repair manual to properly relieve any pressure.
* Fuel Pump Replacement: When replacing the fuel pump, ensure that you use a quality replacement part and that the installation is done correctly.
This is a complex repair job that requires mechanical skills and the correct tools. If you are not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Improperly working on the fuel system can be very dangerous.
