A fuel pump usually is an essential component on an internal combustion engine device, commonly seen on cars. Some engines like old motorcycles don’t require a fuel pump. They use gravity to send fuel to the engine from the fuel tank. Fuel pumps deliver the fuel from the fuel tank to the engine using low pressure mechanical pump which is mounted in the fuel tank. Some engines have two fuel pumps, a low pressure/high volume supply pump and a low volume/high pressure supply pump.
When starting the engine, you may notice that it is hard to start. You may also experience loss of power while in a full throttle situation. This may be a sign that the fuel pump is in a bad condition. It is better to check if the fuel pickups, filters, electrical connectors, and pump relays are in a good working condition before replacing the fuel pump.
Electric fuel pumps can be found in two locations. One is inside the gas tank and the other is underneath the car. This fuel pump generates high pressured fuel which is supplied into your electronic fuel injection system.
Some tools are needed in changing a fuel pump. These include the following: a replacement fuel pump, large fuel catch container, new fuel line, fire extinguisher and eye protectors (for safety purposes), socket set, open end wrench set, flat head screwdriver, and Phillips head screwdriver.
Changing a fuel pump is not a hard thing to do. It can be easily done by following these steps carefully:
- Release the pressure first in the fuel system. The fuel injection systems functions in a very high pressure. Explosive results may happen if this pressure is not released before removing the fuel lines so it is better to put the fire extinguisher somewhere near.
- Start the car engine then pull the fuel pump fuse in the fuse box. If your car doesn’t have a fuel pump fuse, pull the relay that operates the fuel pump instead. If done correctly, the engine will die instantly, releasing all the pressured fuel in the system.
- Locate the position of the fuel pump. Fuel pump located underneath the car is held by a number of bolts. You will need the open end wrench in this task.
- Remove the fuel lines from the fuel pump using the open end wrenches. Gas will surely leaks while removing the fuel lines so use the fuel catch container while removing.
- Disconnect the wire connections of the fuel pump. There should be two wires, a ground and a positive wire. It is better to mark which is which so reconnecting wouldn’t be a problem. The wires may be held by plugs, small bolts or screws.
- Swap the previous fuel pump with the new one. Connect the wiring and the fuel lines back. Then return the fuel pump to its position, tighten it and make sure it is not loose.
- Return the removed fuel pump fuse or the fuel pump relay from earlier. Then start the engine and prepare for a test drive.
There you go, you have just replaced your fuel pump.