Changing Fuel Filter On 2002 Subaru Impreza Ts: Step-By-Step Guide

Changing the fuel filter on a 2002 Subaru Impreza TS is a relatively straightforward process, but it is important to exercise caution when handling flammable fuel. Before beginning, ensure the key is out of the ignition and the gas cap is off to release any pressure. The fuel filter can be located under the hood, next to the window wash tank and near the firewall. There are two hoses, labelled 'IN' and 'OUT', which need to be disconnected by first removing the hose clamps with a small Phillips screwdriver, and then carefully separating the hoses from the hard lines with a small flathead screwdriver. It is important not to damage the rubber fuel lines during this process.

Remove gas cap and release fuel pressure

To remove the gas cap and release fuel pressure from your 2002 Subaru Impreza TS, follow these steps:

Firstly, locate the gas cap and unscrew it. This will help to relieve any built-up pressure in the fuel system.

Next, enter the car and look under the passenger side kick panel, which is located next to the glovebox. Here, you will find a relay with a green plug. This plug is situated next to another relay with a brown plug. Carefully disconnect the green plug, as it is connected to the fuel pump relay.

Once the green plug is disconnected, turn the engine on. The engine should start and then quickly die due to the disrupted fuel supply. Repeat this process of turning the engine on and off until it cranks for several seconds without starting. Do this a couple of times to ensure the fuel pressure is fully released.

At this point, you can carefully remove the fuel lines from the old filter. Keep a rag or towel nearby, as there may still be residual pressure in the lines, and fuel could leak out. Be cautious when handling the fuel lines, as they may be difficult to remove and you may need to use pliers to twist them off.

Now that the fuel pressure has been released, you can proceed with the rest of the fuel filter replacement process, ensuring you work in a well-ventilated area and take the necessary safety precautions when handling fuel.

Please note that this process was detailed by a Subaru owner in an online forum, and while it may be helpful, it is not an official guide. Always refer to the vehicle's manual or seek professional advice for any car maintenance procedures.

Disconnect fuel pump relay

Disconnecting the fuel pump relay is an important step when changing the fuel filter on a 2002 Subaru Impreza TS. This process helps to release the fuel pressure before removing the filter. Here is a detailed guide on how to do it:

First, locate the fuel pump relay. It is found under the passenger side kick panel, next to the glovebox. Look for a relay with a green plug; it will be next to another relay with a brown plug. Once located, follow these steps:

• Disconnect the green plug from the fuel pump relay.
• Crank the engine. It should start and then die.
• Repeat the process until the engine cranks for several seconds without starting. Do this a couple of times.
• Now the fuel lines can be safely removed from the old filter. Keep a rag handy, as there may still be residual pressure in the lines.
• Be prepared for the possibility that the lines may be difficult to remove from the filter. If necessary, use a pair of pliers to twist them off.
• Once the lines are removed, you can proceed with installing the new filter.
• After installing the new filter and tightening the lines, plug the relay back in and put the gas cap back on.
• Turn the key from "off" to "run" a couple of times and hold it there for several seconds to prime the fuel pump and the system.
• Finally, start the engine and carefully check around the filter for any leaks.

This procedure will help ensure that the fuel pressure is safely released before removing and replacing the fuel filter. It is important to follow these steps carefully to avoid any potential hazards associated with handling highly pressurized flammable fuel.

Remove lines from the old filter

To remove the lines from the old filter, you will need to first release the fuel pressure. To do this, remove the gas cap. Then, locate the relay with a green plug under the passenger side kick panel next to the glovebox. Disconnect the green plug, which is the fuel pump relay. Next, crank the engine—it should start and die. Repeat this process until the engine cranks for several seconds without starting, doing this a couple of times.

At this point, you can remove the lines from the old filter. Keep a rag handy, as there may still be residual pressure left in the lines. Be cautious, as the lines may be difficult to remove from the filter. You might need to use a pair of pliers to twist them off if they are stuck.

Install new filter and tighten lines

To install the new fuel filter, first, make sure the filter looks the same as the old one. Remove the rubber sleeve from the old filter and put it on the new one. Place the new filter in the same position as the old one and resecure the metal clamp.

Now, take your oil dipstick and place a drop or two of oil on the new filter stems where the hoses go. This will make it easier to slide the hoses on and work better than using spit. Next, slide the hoses onto the new filter and tighten the hose clamps. Make sure the hoses and other components are in place and then resecure your gas cap.

Try to start the engine. It won't start on the first try because the lines and filter have to be primed, so start it again and after it starts, look closely to make sure your lines are not leaking and double-check your work. Rev the engine a few times to ensure no leaks and you are all set.

Plug relay back in and check for leaks

Once you have finished replacing the fuel filter, it's time to plug the relay back in and check for leaks. This is an important step to ensure that your vehicle is safe to operate and that there are no fuel leaks that could pose a fire hazard.

First, locate the relay under the passenger side kick panel next to the glovebox. It will be a green plug next to another relay with a brown plug. Plug the green plug back into the fuel pump relay socket.

Next, turn the key in the ignition from "off" to "run" a couple of times and hold it in the "run" position for several seconds. This will activate the fuel pump and prime the system.

After priming the system, start the engine. Once the engine is running, carefully inspect the area around the fuel filter for any signs of leaks. Pay close attention to the connections and hoses as these are the most likely places for leaks to occur.

If you notice any leaks, immediately turn off the engine and re-tighten the connections. You may need to apply a small amount of oil to the filter stems to create a better seal. Repeat the process of plugging the relay, priming the system, and checking for leaks until you are confident that there are no leaks.

Additionally, it is important to be cautious when working with fuel. Always work in a well-ventilated area and have a fire extinguisher nearby in case of any accidents. It is also recommended to wear safety goggles and gloves to protect your eyes and hands.

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