How do I fix my gas gauge? It's not set properly. It reads empty when the tank is full. Do I have to replace the fuel pump and sending unit ?
Jun 19, 2020 at 7:23 AM
Gas gauge not set correctly
1995 OLDSMOBILE 88
TONYD235
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Good morning,
That is the most common cause of the failure.
I attached a wiring diagram for you to view. Make sure there is power to the sender unit for the gauge.
Roy
REMOVE OR DISCONNECT
1. Relieve fuel pressure. Refer to Fuel System/Service and Repair. See: Fuel Delivery and Air Induction > Procedures
2. Disconnect negative battery cable.
3. Raise vehicle on hoist.
4. Remove fuel tank.
5. Remove fuel gauge sender and pump assembly by turning cam lock ring counterclockwise. Lift assembly from fuel tank and remove fuel pump from fuel gauge sender unit.
6. Disconnect pump wires, hose clamps, and clamp around pump body.
7. Pull pump assembly out of rubber connectors.
8. Inspect fuel pump attaching hose for any signs of deterioration. Replace as necessary.
INSTALL OR CONNECT
1. Push fuel pump assembly into attaching hose.
2. Connect pump wires, hose clamps at attaching hose and around pump body.
3. Place fuel tank sender and pump assembly into tank using new O-ring.
4. Place cam lock over assembly and lock by turning clockwise.
5. Install fuel tank.
6. Start engine and check fuel pipe connector for visual leaks.
That is the most common cause of the failure.
I attached a wiring diagram for you to view. Make sure there is power to the sender unit for the gauge.
Roy
REMOVE OR DISCONNECT
1. Relieve fuel pressure. Refer to Fuel System/Service and Repair. See: Fuel Delivery and Air Induction > Procedures
2. Disconnect negative battery cable.
3. Raise vehicle on hoist.
4. Remove fuel tank.
5. Remove fuel gauge sender and pump assembly by turning cam lock ring counterclockwise. Lift assembly from fuel tank and remove fuel pump from fuel gauge sender unit.
6. Disconnect pump wires, hose clamps, and clamp around pump body.
7. Pull pump assembly out of rubber connectors.
8. Inspect fuel pump attaching hose for any signs of deterioration. Replace as necessary.
INSTALL OR CONNECT
1. Push fuel pump assembly into attaching hose.
2. Connect pump wires, hose clamps at attaching hose and around pump body.
3. Place fuel tank sender and pump assembly into tank using new O-ring.
4. Place cam lock over assembly and lock by turning clockwise.
5. Install fuel tank.
6. Start engine and check fuel pipe connector for visual leaks.
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Jun 19, 2020 at 7:37 AM