I had to remove fuel tank to clean out debris and now my fuel gage does not work. i have a new pump installed prior to removal of tank and it was working. i have pulled pump to attempt to fix but no luck
It may be as simple as the position of the float. I had this problem with getting a false reading. The loat was hitting the side of the tank. If you have one that you took out hold it above the one in the tank for reference.
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all parts may be new but if the fuel gauge sender float has been bent when being installed into tank this will give false readings - if the float has been bent up during installation then it is likely that it will only read fro three quarters of a tank up as the float can not get any lower due to being bent, I recommend that a new pump/float is installed very carefully.
There is some sensors that they had to disconnect and other wires that they most likely removed to install fuel pump such as sensor that monitors fuel pump preside. Trace any and all line to the fuel pump to see if were hooked up, if so unplug and plug back in, possible not good connection. Let me know results. Thanks mike
The Fiero is equipped with a electric fuel pump and gauge sending unit mounted in the fuel tank. The pump is serviced and a complete unit by removing the fuel tank. REMOVAL & INSTALLATION
To reduce the risk of fire and personal injury, it is necessary to relieve the fuel system pressure before servicing any fuel system component. If this procedure is not performed, fuel may be sprayed out of the connection under pressure. Always keep a dry chemical (Class B) fire extinguisher near the work area.
Disconnect the negative (-) battery cable.
Relieve the fuel system pressure.
Remove the fuel pump fuse from the fuse block located in the passenger compartment. Start the engine and run until the engine stops due to the lack of fuel. Crank the engine for 3 seconds to ensure all pressure is relieved.
Drain all the fuel from the tank using a suction pump.
Raise the vehicle and support with jackstands.
Disconnect the wiring from the tank.
Remove the ground wire retaining screw from under the body.
Disconnect all hoses and filler neck from the tank.
Support the tank on a jack and remove the retaining strap nuts.
Lower the tank enough to disconnect the fuel sending unit wires.
Disconnect the fuel line, vapor line and return line.
Remove the tank from the vehicle.
Remove the fuel gauge/pump retaining ring by turning the cam lock ring counterclockwise using a spanner wrench such as tool J-24187.
Remove the gauge unit and the pump.
Inspect the fuel pump attaching hose for any signs of deterioration and replace if necessary. Also, check the rubber sound insulator at the bottom of the pump.
Push the fuel pump assembly into the attaching hose.
Using a new O-ring seal, install the pump assembly into the tank.
Install the cam lock ring over the pump and lock by turning clockwise with a spanner wrench J-24187 or equivalent.
Support the tank on a suitable jack.
Raise the tank enough to connect all fuel and filler hoses.
Connect all electrical wires to the pump and tank.
Raise the tank and install the retaining strap nuts. Use new sound reducing pad if they are damaged. Check all connections and wire to ensure proper installation before refilling the tank.
Refill the tank with unleaded fuel. Reconnect the negative (-) battery cable.
Start the engine and check for fuel leaks and gauge operation.
see instructions from AutoZone:
The fuel pump assembly is located in the fuel tank. Refer to the fuel tank assembly illustrations in this section. On most applications, the fuel tank must be lowered to remove the fuel pump assembly. The fuel pump assembly is cooled by the fuel in the tank.
REMOVAL & INSTALLATION
See Figure 1
Before disconnecting the fuel lines or any of the fuel system components, release the fuel system pressure as described previously in this section. Releasing system pressure is a very important step for the correct removal of the electric fuel pump.
Fig. Fig. 1: Internal view of the electric fuel pump
Disconnect the negative battery cable. Unfasten the fuel pump assembly electrical connector and remove the fuel tank inspection cover.
If the truck has no fuel tank inspection cover, the fuel tank must be lowered or removed to gain access to the in-tank fuel pump.
Disconnect the fuel outlet and return hoses. Remove the fuel tank assembly, if necessary.
Remove the ring retaining bolts and the O-ring, then lift the fuel pump assembly from the fuel tank. Plug the opening with a clean rag to prevent dirt from entering the system.
When removing or installing the fuel pump assembly, be careful not to damage or deform it. Always install a new O-ring. To install:
Install the fuel pump assembly in the fuel tank with a new O-ring. Install the ring retaining bolts. Install the fuel tank if removed.
Reconnect the fuel lines and fasten the electrical connection.
Connect the battery cable, then start the engine and check for fuel leaks.
The "Check Engine Light'' may stay on after installation is completed. If so, the trouble code in the control unit's memory must be erased. To erase the code, disconnect the battery cable for 10 seconds, then reconnect it a verify that the light is extinguished.
See Figures 2 and 3
Relieve the fuel system pressure, as described previously in this section.
Disconnect the fuel inlet hose at the electro injection unit.
Fig. Fig. 2: Make sure that the fuel line hose clamps are installed properly
Fig. Fig. 3: Testing fuel system pressure using a gauge and a "T'' fitting
Install a fuel pressure gauge.
Start the engine and check the fuel line for leakage.
Read the pressure on the pressure gauge. The gauge should read approximately 36.3 psi (250 kPa).
Relieve the fuel system pressure again.
Remove the pressure gauge from the fuel line and reconnect the fuel inlet hose.
In order to replace the fuel pump the gas tank has to be removed from the car. Both the pump and the gas gage are located in the tank. They probable didn't reconnect the wires going to the gas gage. I guess it is possible that they didn't have anything to do with it and it just happened to go bad while they were working on your car. Not likely but possible.
bad connection either at the gauge or at the fuel pump gauge sender in the tank or plug external to pump, access panel in the trunk remove it and move the connection around see it it changes gauge reading.