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It is hung up due to a misinstallation of the pump. Y-THINK-Y
No, you installing a fuel pump has nothing to do with the fuel gauge
The fuel pump may be fine but the sending unit may not be. The sending unit is probably the most common cause of fuel gauge failure.
Did you disconnect the battery for a while?
have an experience mechanic test you fuel pump fuel level sensor, which is part of the fuel pump, ground the wires and if the gauge pecks gauge is good. if it don't you have to replace your cluster which is a seal item and must be replaced as a unit. do not try this yourself.
If your fuel pump was replaced and all of the fuel was not drained out, then it will read "empty" when it still has ~1/4 tank the sender unit is part of the pump
probably the sending unit in the gas tank attached to the fuel pump module is not working. you will need to most likely order fuel pump w/ sending unit Answer: The float is made of brass and over time they leak and sink causing the fuel gauge to read empty. The '84-'85 Bll 2.8L did not have a fuel pump in the tank.
broken fuel gauage sensor or possibly a broken fuel pump indicator
It may possibly be the fuel pump has quit working......or the fuel pump relay. Have your fuel pressure read by using a gauge connected to the fuel rail. If the pump is NOT pumping then you have to find out if it's the pump or the relay. you might check the ignition coil.
either that or the gauge, wiring or a connector.
The gas gauge and fuel pump are on two separate circuits tand both go inside the gas tank. The gas gauge usesf a float that moves a resistor according to fuel level. Gas gauges. When you experiewnce the gas gauge not working at all I would look for a disconection external to the tank first. If you cna send six volts from the tank sender to the gauge this should cause the gauge to read. If it does then you know the problem is with the sending unit and it must be removed from the tank to repair or replace.
It is necessary to read the density and the quality of the gauge. You should see the lower side.