Regan Brown
Replacing a fuel pump on a 1999 Toyota Camry is a moderately complicated job. It's best performed at your dealership's service department, but it can be done at home with a wrench, a screwdriver, and a replacement fuel pump. Before you start, it's important to understand if fuel pressure at the fuel rail is the problem. You can do this by disconnecting one of the fuel rails and putting your fuel pressure gauge onto the union. If your fuel pressure is on target, your fuel pump and fuel filters are likely fine.
| Characteristics | Values |
|---|---|
| Tools needed | Wrench, screwdriver, replacement fuel pump |
| First steps | Depressurize the fuel system by opening the gas cap, locating the fuse panel under the hood and taking out the relay “C/OPN” |
| Next steps | Start the engine and let it run until it stops, then disconnect the negative battery cable |
| Replacing the fuel pump | Place the new fuel pump in place on the assembly hosing and connect it. Reconnect the electrical connector to the filter for the fuel sock, replace the rubber isolator and place the fuel pump/sending unit back into the plastic support |
| Final steps | Replace the unit into the fuel tank and bolt it in. Put the electrical connectors back on and reattach the fuel line. Put the rear seats back in the car. |
| Final checks | Pressurize your Toyota Camry fuel system by turning on the ignition for a few seconds, turning it off for 10 seconds, and then repeating the entire “on” and “off” sequence from five to ten more times |
| Additional notes | Before replacing the fuel pump, check if fuel pressure at the fuel rail is your problem. You do not have a fuel return loop on your model. As such, your tank fuel pump has a fuel pressure regulator that is located just above the fuel pump |
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What You'll Learn
Depressurising the fuel system
To depressurise the fuel system, you must first open the gas cap, locate the fuse panel under the hood and take out the relay “C/OPN”. Next, you will start the engine. Let the car run until it stops, and then disconnect the negative battery cable.
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Disconnecting the negative battery cable
It is important to note that you should only consider replacing the fuel pump if you have determined that low fuel pressure is the issue. Your 1999 Camry does not have a fuel return loop, so your tank fuel pump has a fuel pressure regulator located just above the fuel pump. There is also an intank fuel filter between the fuel pump and fuel pressure regulator, as well as a fuel filter canister located in the engine compartment.
After disconnecting the negative battery cable, you can proceed with the rest of the fuel pump replacement process. This includes placing the new fuel pump on the assembly hosing, reconnecting the electrical connector to the filter for the fuel sock, and replacing the rubber isolator.
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Replacing the fuel pump
To replace the fuel pump, you will need to start by depressurising the fuel system. Open the gas cap, locate the fuse panel under the hood, and take out the relay "C/OPN". Then, start the engine and let it run until it stops. Disconnect the negative battery cable.
Next, you will need to remove the rear seats of the car to access the fuel tank. A mechanic will need to get to the failed pump through the top of the fuel tank via an access panel in the passenger compartment or by removing the tank from the vehicle.
Once you have accessed the fuel pump, you will need to disconnect the fuel line and electrical connectors. Remove the old fuel pump and replace it with a new one. Place the new fuel pump on the assembly hosing and connect it. Reconnect the electrical connector to the filter for the fuel sock and replace the rubber isolator. Put the fuel pump/sending unit back into the plastic support and bolt it in.
Finally, you will need to pressurise the fuel system. Turn on the ignition for a few seconds, then turn it off for 10 seconds. Repeat this sequence five to ten more times.
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Reconnecting the electrical connectors
To reconnect the electrical connectors, you will need to place the new fuel pump in place on the assembly hosing and connect it. Reconnect the electrical connector to the filter for the fuel sock, replace the rubber isolator and place the fuel pump/sending unit back into the plastic support. Replace the unit into the fuel tank and bolt it in. Put the electrical connectors back on and reattach the fuel line. Put the rear seats back in the car. When you are finished, you need to pressurise your Toyota Camry fuel system. You can do this by turning on the ignition for a few seconds. Turn it off for 10 seconds, and then repeat the entire “on” and “off” sequence from five to ten more times.
Before you reconnect the electrical connectors, it would be wise to understand if fuel pressure at the fuel rail is your problem. You do not have a fuel return loop on your model. As such, your tank fuel pump has a fuel pressure regulator that is located just above the fuel pump. Besides the fuel pickup sock (filter), there is also an intank fuel filter between the fuel pump and fuel pressure regulator. There is also a fuel filter canister located in the engine compartment (one that you fear you may damage the fuel supply tube because the fitting may be corroded to the tube and twist the tube, breaking it).
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Repressurising the fuel system
To repressurise the fuel system, you will need to turn on the ignition for a few seconds. Then, turn it off for 10 seconds, and repeat the entire 'on' and 'off' sequence from five to ten more times.
Before you replace the fuel pump, it is important to understand if fuel pressure at the fuel rail is the problem. Your 1999 Camry does not have a fuel return loop, so your tank fuel pump has a fuel pressure regulator that is located just above the fuel pump. There is also an intank fuel filter between the fuel pump and fuel pressure regulator, and a fuel filter canister located in the engine compartment.
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Frequently asked questions
You will need a wrench, a screwdriver and a replacement fuel pump. Start by depressurising the fuel system by opening the gas cap, locating the fuse panel under the hood and taking out the relay “C/OPN”. Next, start the engine and let it run until it stops. Disconnect the negative battery cable. Place the new fuel pump in place on the assembly hosing and connect it. Reconnect the electrical connector to the filter for the fuel sock, replace the rubber isolator and place the fuel pump/sending unit back into the plastic support. Replace the unit into the fuel tank and bolt it in. Put the electrical connectors back on and reattach the fuel line. Put the rear seats back in the car. Finally, pressurise your fuel system by turning on the ignition for a few seconds, turning it off for 10 seconds, and repeating the sequence five to ten more times.
Before you consider replacing the fuel pump, it would be wise to understand if fuel pressure at the fuel rail is your problem. Disconnect one of the fuel rails and put your fuel pressure gauge onto the union, while also putting the union back onto the fuel rail. This way, you should be able to run the engine and check fuel pressure at the same time. If your fuel pressure is on target, your fuel pump and fuel filters are likely fine.
Replacing a fuel pump is a moderately complicated job and it is recommended that it is performed at your dealership’s service department.
