Here's a general outline. Specific steps and tools may vary slightly, so consult a repair manual specific to your 2004 Dodge Ram 4.7L. A Haynes or Chilton manual is a worthwhile investment for this and future repairs.
I. Preparation:
1. Safety First: Disconnect the negative battery terminal.
2. Gather Tools: You'll need various sockets, wrenches (metric), screwdrivers (Phillips and flathead), a fuel pump removal tool (often a specialized tool to detach the retaining ring on the pump), a fuel line disconnect tool, safety glasses, gloves, rags, jack stands (essential!), and possibly a fuel pressure gauge to relieve pressure (though some recommend just letting the pressure bleed out naturally after disconnecting the battery).
3. Jack Up and Secure: Safely jack up the truck and secure it with jack stands under the frame near the rear axle.
4. Locate Fuel Pump: The fuel pump is usually located inside the fuel tank, accessible through a filler neck access panel under the rear passenger seat (or the bed, depending on the configuration. Check your repair manual).
II. Accessing the Fuel Pump:
1. Remove Access Panel: Depending on the truck's configuration, you may need to remove the rear seats or a section of the bed flooring to access the fuel tank. Your repair manual will show the correct procedure.
2. Disconnect Fuel Lines: Carefully disconnect the fuel lines using the appropriate disconnect tool. Have rags ready to soak up any spilled fuel. Be very careful not to damage the fuel lines.
3. Disconnect Electrical Connectors: Unplug the electrical connectors from the fuel pump assembly.
4. Remove Fuel Pump: This is where the specialized fuel pump removal tool is typically needed to get the retainer ring off. This is often the most challenging part of the process. Carefully follow the instructions in your repair manual. Once the retainer is off, the fuel pump assembly should come out of the tank.
III. Fuel Pump Replacement:
1. Inspect Old Pump: Examine the old fuel pump for any obvious signs of failure before discarding it.
2. Install New Pump: Install the new fuel pump assembly, ensuring it seats properly in the tank. Use the retainer ring and tool to secure it correctly. Double-check everything before reassembling.
3. Reconnect Electrical Connectors and Fuel Lines: Carefully reconnect the electrical connectors and fuel lines. Securely attach everything; a fuel leak could be dangerous.
IV. Reassembly and Testing:
1. Reinstall Access Panel: Replace the access panel.
2. Lower Vehicle: Carefully lower the vehicle from the jack stands.
3. Reconnect Battery Terminal: Reconnect the negative battery terminal.
4. Test the System: Start the engine and check for leaks around the fuel lines and pump access point. Listen for any unusual noises from the fuel pump.
Important Considerations:
* Fuel Pressure: While some let the system bleed naturally, a fuel pressure gauge can be used to safely release residual fuel pressure. This is safer, but not strictly necessary.
* Repair Manual: A repair manual specific to your vehicle is crucial. Generic instructions may not accurately reflect your specific model.
* Professional Help: If you are not comfortable performing this repair, it's best to seek help from a qualified mechanic. Improperly installing a fuel pump can lead to dangerous situations.
* Fuel Pump Strainer: You may want to replace the fuel pump strainer (sock) while you are at it. It's usually a cheap part and prevents debris from clogging your new pump.
This is a general guide. Always refer to a repair manual for your specific vehicle before attempting this repair. The steps can be more complex than described here. Safety is your top priority. If in doubt, take it to a professional.
