How to Install a Fuel Transfer Pump

The fuel transfer pump is a vital component of nearly every modern engine that doesn’t rely on gravity to feed the fuel from the tank. It can be mechanical or electrical depending on the engine type. Follow the simple steps below to effectively install your own fuel transfer pump.

Tools and Materials

  • New fuel pump
  • Screwdrivers
  • Set of Mechanical Wrenches (depending on the type)
  • Multiple colors electrical tape (optional)

Step 1: Checking the Owner’s Manual

To begin, buy the new pump. Check the owner’s manual for the model of the manufacturer. Older carburetor-based cars will have a mechanical pump, while newer injection based engines will have electrical fuel transfer pumps. If you can’t find the right model, ask at your local car shop mentioning the car model you own. The shop personnel have catalogs of various different models. You can even take the part directly to the shop to show them what you need.

Step 2: Locate the Position of your Fuel Pump

Check the owner’s manual again to locate the position of your fuel transfer pump. You can also do this manually by checking your car. Many cars have electric pumps located in the fuel tank so that is a good place to start. Once located, notice what type of fastening it has so you’ll know what tools you need.

Step 3: Safety First

Before starting to work on replacing the fuel transfer pump make sure the engine has not been used recently. This will allow the fuel to settle and assure that the components are cold. Next, disconnect the battery terminals completely and move them out of the way. A spark is the last thing you want when dealing with fuel.

Step 4: Replacing the Pump

If the fuel transfer pump is external, just unfasten the holding using either a wrench or a screwdriver. If the pump is inside the tank, look for the ring of the FSU after taking off the tank. Before removing all the cables and hoses from the pump take a mental note of where each of them is positioned. Alternatively, mark all of them using different colored electrical tape and write down their position. Disconnect everything from the old pump and apply all connections to the one being installed. Set it back in its original position and fasten using the holding mechanism.

Step 5: Final Inspection

Check that all bolts, rings, clasps or screws have been securely fastened. See that you’ve reattached all the cables and hoses back in their original positions. Having the wires previously marked means this will be a lot easier as it leaves little room for error. Don’t leave any wires or hoses unconnected.

Step 6: Reconnecting the Power

Once completing these steps, all that’s left to do is to reattach the battery terminals and start your engine. Leave the engine running and do a thorough check for any leaks. A sure way to tell if you have any leaks is to check the spot underneath your parking spot. For a week after the installation do a routine daily check to see that your fuel transfer pump is in order.