Here's a general overview. This is not a complete, step-by-step guide, and variations exist depending on your specific engine and fuel system configuration. Always consult a repair manual specific to your vehicle's year, make, and model for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
Safety Precautions:
* Disconnect the negative battery cable before starting any work.
* Relieve fuel system pressure. This usually involves using a fuel pressure release tool or carefully depressing the fuel pressure regulator (often located on the fuel rail). Consult your repair manual for the correct method.
* Work in a well-ventilated area. Fuel fumes are hazardous.
* Wear safety glasses and gloves.
* Have a fire extinguisher nearby.
General Steps (consult your repair manual for specifics):
1. Access the Fuel Pump: This usually involves dropping the fuel tank. This is the most labor-intensive part. You'll likely need to:
* Raise the rear of the vehicle securely with jack stands.
* Remove the access panel(s) under the vehicle.
* Disconnect the fuel lines (carefully, you might want to use fuel line clamps to keep track of orientation).
* Disconnect the electrical connector to the fuel pump.
* Often, you need to lower the fuel tank straps.
* Carefully lower the fuel tank. Some tanks have a fuel tank retaining strap, be sure to unhook those too.
2. Remove the Old Fuel Pump: Once the tank is lowered, you'll typically find the fuel pump assembly at the top of the tank. This usually involves removing a retaining ring or cover. Pay close attention to the process as you'll need to reverse it later.
3. Install the New Fuel Pump: Carefully install the new fuel pump assembly, ensuring it's correctly seated.
4. Reassemble Everything: Reverse the removal process, ensuring all connections are secure. Reconnect the fuel lines and electrical connector. Double and triple check all connections before raising the tank.
5. Raise the Fuel Tank: Carefully raise the fuel tank back into position. Secure the straps and ensure it sits correctly.
6. Reconnect the Battery: Reconnect the negative battery cable.
7. Check for Leaks: After reconnecting the fuel lines, carefully inspect for any leaks.
8. Prime the Fuel System: You may need to prime the fuel system, this is usually done by turning the ignition key to the "on" position for several seconds without cranking the engine. This will allow the pump to fill the lines with fuel. Consult your repair manual.
9. Start the Engine: Start the engine and check for proper operation. Listen for the fuel pump running (you might hear a brief whirring sound during initial startup). Check for any leaks or unusual noises.
Important Considerations:
* Fuel Pump Type: Ensure you purchase the correct fuel pump for your vehicle's engine and fuel system. The wrong pump can damage your engine.
* Fuel Tank Straps/Support: These can be quite difficult to remove and reinstall, so pay careful attention to how they come apart.
* Fuel Level: It's best to have as little fuel in the tank as possible to reduce the weight and risk of spillage.
This is a complex repair. If you are not comfortable performing this repair yourself, it is strongly recommended to take your vehicle to a qualified mechanic. Improper installation can lead to serious problems, including fire hazards. Always prioritize safety.
