Wire a fuel gauge by first disconnecting the old dysfunctional unit to replace it with a new one. Obtain 12-volt power from the fuse box using a standard wire, and connect it to the positive terminal of the fuel gauge. Next, connect a wire from the float on the fuel tank to the negative terminal of the fuel gauge.Know More
When wiring a fuel gauge, it is wise to have a full tank in order to monitor the installation correctly. Next, gather all the necessary tools and equipment together. Be careful not to use power tools around the fuel tank, as it can lead to combustion or explosion.
The float is usually made of fiberglass and connected to a resistor. If wired wrongly, there will be some inaccuracies on the fuel gauge reading as compared to the actual volume of fuel in the car’s tank. For example, the needle on the gauge may remain in the "full" position even after travelling a considerably long distance. On the other hand, the needle may remain on the "empty" position even after the car has been fueled with a considerable volume. The shape of the fuel tank can also cause these errors, as they may be shapelessly designed to fit in the frame of the car.Learn more about Car Parts & Maintenance
A mechanical temperature gauge uses a Bourdon tube filled with temperature-sensitive liquid to indicate temperature, while an electrical model uses a variable-resistance unit that varies current to the dial as temperatures change. Most modern vehicles use electrical gauges as the mechanical versions are sensitive and expensive to replace.Full Answer >
Fuel gauge problems are commonly the result of faulty electrical grounding at the tank or a problem with the sending unit inside the tank but can also be caused by faulty wiring or a bad fuse. Troubleshooting the problem involves a process of elimination that includes each of these as a possible root cause.Full Answer >
Replacing a fuel pump requires draining and dropping the gas tank from the vehicle to access the unit. Some vehicles will have a panel located under the rear seats of the car to allow easier access to the pump and avoid dropping the tank.Full Answer >
A fuel pressure sensor is a device that reads the pressure in the fuel rail and transmits the information to the engine control unit. The fuel pressure sensor, or FPS, is fitted onto the common rail. It reads pressure with both positive and negative values.Full Answer >