Regan Brown
If your 1997 Volvo 850 is not starting, the problem could be the fuel pump. The fuel pump is located under the cargo carpet in the back of the car. To replace the fuel pump, you will need to remove the access plate inside the car, depressurise the fuel line, disconnect the fuel lines, unplug the fuel pump connector, unscrew the locking ring, and lift the pump out of the fuel tank. You can then choose to rebuild the pump by replacing the pump component or replace the whole pump assembly.
| Characteristics | Values |
|---|---|
| Location of fuel pump | Under the cargo carpet in the back of the car |
| Accessing the fuel pump | There is an access plate inside the car (in the trunk/boot of Sedans and under the rear deck of wagons). Once this cover is removed, the pump can be replaced from inside the car |
| Disconnecting the fuel pump | Depressurise the fuel line at the Schrader valve near the fuel filter. Disconnect the fuel lines by carefully prying up the slip-on fuel connectors |
| Removing the fuel pump | Unplug the fuel pump connector. Unscrew the plastic locking ring holding the fuel pump to the fuel tank using large adjustable jaw oil filter pliers or a special fuel pump spanner wrench |
| Drying the pump | Dry the pump out in the sun |
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What You'll Learn
Removing the access plate
To remove the access plate, you will need to locate it first. In sedans, it is inside the car in the trunk/boot, and in wagons, it is under the rear deck. Once you have found it, you can remove the cover to access the pump.
The access hole is under the cargo carpet in the back of the car. There is a wire going to it. You will need to remove this wire and then take out the access hole.
Now you can lift the pump out of the fuel tank. You can then dry the pump out in the sun.
To rebuild the pump, you will need a complete fuel pump service kit. This includes the pump, new locking ring, strainer, wiring harness, fuel hose, gasket, fuel filter, and a new fuel pump relay.
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Depressurising the fuel line
To depressurise the fuel line, locate the Schrader valve near the fuel filter underneath the car. This will release any pressure in the fuel line, making it safe to work on. It is important to note that if the pump is fully dead, there may not be much pressure in the line to begin with.
After depressurising the line, the next step is to disconnect the fuel lines. This is done by carefully prying up the slip-on fuel connectors. It is important to note their position for reconnection later.
Once the fuel lines are disconnected, the fuel pump connector can be unplugged, freeing the unit for removal. The next step is to unscrew the large plastic locking ring holding the fuel pump to the fuel tank. This can be done with large adjustable jaw oil filter pliers or a special fuel pump spanner wrench, as per the official Volvo method.
By following these steps, you can safely depressurise the fuel line and proceed with replacing the fuel pump in a 1997 Volvo 850.
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Disconnecting the fuel lines
To disconnect the fuel lines, you will need to depressurise the fuel line at the Schrader valve near the fuel filter. Carefully pry up the slip-on fuel connectors, noting their position for re-connection.
Once the fuel lines are disconnected, you can remove the fuel pump. To do this, unplug the fuel pump connector so the unit is free to remove. Unscrew the big plastic locking ring holding the fuel pump to the fuel tank. This can be done with large adjustable jaw oil filter pliers or a special fuel pump spanner wrench.
If you are rebuilding the pump, you can cover the open fuel tank hole with aluminium foil to minimise vapours in the car and reduce the chance of something falling into the tank.
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Lifting the pump out of the fuel tank
To lift the pump out of the fuel tank, you must first unplug the fuel pump connector so that the unit is free to remove. Then, unscrew the plastic locking ring holding the fuel pump to the fuel tank. This can be done with large adjustable jaw oil filter pliers, or a special fuel pump spanner wrench.
Once the locking ring has been removed, the pump can be lifted out of the fuel tank. It is recommended to dry the pump out in the sun before rebuilding or replacing it.
While the pump is being rebuilt or replaced, the open fuel tank hole should be covered to minimise vapours in the car and reduce the chance of something falling into the tank. This can be done by covering the hole with aluminium foil.
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Drying the pump
To dry the pump, place it in the sun. While the pump is drying, cover the open fuel tank hole with aluminium foil to minimise vapours in the car and reduce the chance of something falling into the tank.
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Frequently asked questions
The fuel pump is under the cargo carpet in the back of the car.
There is an access plate inside the car (in the trunk/boot of Sedans and under the rear deck of wagons). Once this cover is removed, the pump can be replaced from inside the car.
First, unplug the fuel pump connector so the unit is free to remove. Then, unscrew the big plastic locking ring holding the fuel pump to the fuel tank.
You can use large adjustable jaw oil filter pliers or the official Volvo method, which involves a special fuel pump spanner wrench.
Carefully pry up the slip-on fuel connectors. Note their position for re-connection.
