What is a fuel sending unit or otherwise called as fuel float?
It is a device attached in the fuel tank of any vehicle that serves as the measuring unit of fuel contained by the tank.
Its parts are:
- the float-is the rectangular plastic at the end of the arm that floats over the fuel.
- the arm-is the stick rod connected to the registor and holds the float at the end. The stick rod moves up and down as the float at the end does. When the fuel tank is full its position is leveled, and when the fuel decreases the position is slanting down.
- the registor-is the circuitry part attached to the fuel tank. The registor will send a message through the fuel gauge that the fuel tank is full, halfway, or empty.
Last week when I went to the refilling station for an oil change and the vehicle was lifted up I noticed that the fuel tank was quite moist with thick accumulated dirt. I suspected that there is something wrong with it.
The Importance of Fuel Sending Unit
The fuel sending unit is very necessary for the operation of the vehicle every time it is used. It measures the volume of the fuel you have set in the fuel tank. It reminds the driver of how long the distance it takes before the fuel is unavailable. It calls for an action if it’s time or not yet time to refill for fuel.
Fuel Sending Unit Issues Must Be Fixed
Once you noticed there is something abnormal you have to fix it immediately. There are two things this unit will save you if in proper condition.
One, it will save you time when you go for your business and the fuel sending unit will tell you through your fuel gauge that you needed to refill before you go for a long journey on areas where there are no available refilling stations.
Imagine when you run out of fuel on areas where there are no fuel refilling stations. You are going to leave your vehicle and look for fuel. There are a lot of inconveniences it will bring when you run out of fuel.
Two, it saves you from additional expenses of fuel due to leak. A defective fuel sending unit seal will allow dripping when you drive and the vehicle shakes every time and then. It may also allow fuel dissipation during a hot day drive.
As you can see the rubber seal is melted. It’s actually not original but an improvised replacement from an interior tire.
There is one bad thing here, it is the use of screw to fasten the fuel sending unit into the fuel tank. Some of the screws are already loose threads. We replaced it with bolts with nuts and are installed right side up in order for the nut to be threaded with the bolt.
I created a video to illustrate how we replaced the unit. Please watch but please use the proper tools to tighten nuts. I’m happy to show you how that fuel sending unit was fixed. You may have another way of doing it but the principle of having that small part can make a difference.