How to Replace a Fuel PumpCarter Fuel Systems / Maintenance, Fuel Pump Failure
If your fuel pump is not pumping enough fuel to keep up with the engine, it may need to be replaced. This can be completed in 12 seamless steps.
If your fuel pump is not delivering enough fuel pressure to meet specifications or not pumping enough fuel to keep up with the engine, it may need to be replaced.
This can be completed in 12 seamless steps; however, it is recommended to have an assistant to facilitate the process.
- Park the vehicle on a firm, level surface and set the parking brake.
- Find the fuel pump, which on most vehicles is in the fuel tank. Once located, open the fuel cap and have an assistant turn the key to the ON position while you listen at the filler opening. The fuel pump will hum for two to three seconds, if working properly. If no sound is made, replacing the pump may be necessary.
- Find and verify the fuel pump fuse and relay.
- If the fuse is blown, replace it with a fuse of the same amperage. Check fuel pump operation. If the fuel pump works, your job is done.
- If the fuse and relay are functional, check for power and ground at the fuel pump. Removing the fuel tank or the back seat may be necessary. If there is power and ground at the pump, then the pump is faulty.
- Relieve the fuel system pressure. Disconnect the negative battery cable.
- Siphon or drain as much fuel as possible from the fuel tank. Disconnect the filler tube hose and the electrical connection to the pump.
- Support the fuel tank with a jack and a block of wood. Remove any retaining straps or bolts holding the tank to the frame. Lower the tank.
- Disconnect the fuel lines and remove the fuel pump from the tank.
- Compare the new fuel pump with the original to verify that you have the correct part. Install the new fuel pump.
- Connect the fuel lines to the pump. Lift the fuel tank up and install the retaining strap. Reconnect the filler tube hose and the electrical connector.
- Reconnect the negative battery cable. Fill the tank with gas. Conduct a road test to confirm a successful repair.