Changing The Fuel Filter In A 1999 Subaru: Step-By-Step Guide

If you're experiencing a drop in gas mileage, it might be time to change your 1999 Subaru's fuel filter. This is a maintenance task that can be done at home, but it's important to take the necessary precautions when working with fuel. Before starting, refer to your Subaru's repair manual for specific instructions and safety information. Additionally, it's recommended to change the fuel filter every 5 years or 50,000 miles, but this may vary depending on your driving conditions and habits.

Prepare the necessary tools and materials

To prepare for changing the fuel filter on a 1999 Subaru, you will need to gather the necessary tools and materials. Here is a detailed list:

First and foremost, ensure you have a replacement fuel filter that is compatible with your 1999 Subaru model. Contact your local auto parts store or dealership to source the correct fuel filter for your vehicle. It is also recommended to have some fuel line ready in case you need to cut away and replace any old or damaged sections.

You will need a set of tools for the job, including:

• A set of wrenches or pliers to remove and tighten hose clamps, screws, and washers.
• Rubber gloves to protect your hands during the process.
• Old dish towels or rags to absorb any fuel spillage and to clean engine surfaces.
• A bucket with hot water and a kettle of boiling water to soak the towels in, helping to loosen the hoses.
• An empty coffee can with a lid to store the clamps, screws, and washers safely.
• A thin, blunt screwdriver to carefully loosen any stubborn hoses.
• A dry chemical (Class B) fire extinguisher to be kept near the work area as a safety precaution.

It is also recommended to have a helper during the process to assist with handing tools and parts, holding hoses out of the way, and ensuring no fuel spray or vapors come into contact with sparks or open flames.

Before beginning the fuel filter replacement, refer to the vehicle's repair manual for any specific precautions or instructions related to your 1999 Subaru model. Ensure you understand the fuel system's layout and the location of the fuel filter. Additionally, it is important to relieve the fuel system pressure before proceeding, as this is a critical step for your safety.

Disconnect the negative battery cable

Disconnecting the negative battery cable is the first step in changing the fuel filter of a 1999 Subaru. Here is a detailed, step-by-step guide on how to do this:

Step 1: Locate the negative battery cable

The negative battery cable is typically black and on the right side of the battery. It is important to identify the correct cable to avoid any mistakes during the disconnection process.

Step 2: Prepare a dry cloth or towel

Before disconnecting the cable, have a dry cloth or towel ready to absorb any excess fuel that may spill during the process. It is important to be prepared and have the necessary tools within reach to ensure a smooth and safe process.

Step 3: Disconnect the negative battery cable

Now, it's time to disconnect the cable. Grasp the cable firmly and pull it away from the battery in one quick, smooth movement. Be cautious and gentle during this step to avoid any damage to the cable or the battery.

Step 4: Secure the cable

As you disconnect the cable, it may want to flop back down and reconnect. To prevent this, use a depleted roll of paper towels or any similar object to wedge under the cable and hold it in place. This will ensure that the cable stays disconnected and doesn't cause any accidental reconnections.

Step 5: Be prepared for the car alarm

When you disconnect the negative battery cable, your Subaru's car alarm may start screaming. This is a common occurrence and shouldn't cause any worry. Have a helper ready to turn off the alarm as soon as it starts, or be prepared to do it yourself quickly.

Step 6: Store the cable safely

Once the cable is disconnected, set it aside in a safe place where it won't be disturbed. Make sure it is away from any flammable materials or sources of ignition. You don't want to accidentally start a fire while working on your car!

Remember, disconnecting the negative battery cable is an important step in changing your 1999 Subaru's fuel filter. Take your time, follow the instructions carefully, and always put safety first.

Remove fuel delivery hoses

To remove the fuel delivery hoses, you will first need to relieve the fuel pressure in the fuel lines. This is an important safety step as it will prevent any fuel spray when you disconnect the hoses. Start by unscrewing the gas cap and locating the fuel pump relay. The relay is labelled and is usually found in either the passenger side interior fuse box or the engine fuse box, depending on your model. Once located, pull out the fuel pump relay.

Next, turn the ignition key for 3 to 5 seconds. If the engine cranks, let it run until it shuts off. After relieving the fuel system pressure, disconnect your negative battery cable. Now, open the hood and find the fuel filter. On a Subaru Forester, the fuel filter is directly behind the windshield washer fluid.

With the fuel pressure relieved, you can now safely remove the fuel delivery hoses. First, unhook the clamps from the fuel filter lines. Then, twist the lines back and forth to pull them free from the fuel filter. Have a towel or shop rag ready to wipe away any fuel that may leak out.

It is worth noting that some newer Subaru models do not have a serviceable filter. Starting in 2005, Subaru switched to a fuel filter that is stored inside the fuel pump, so this procedure will not apply to those models.

Disconnect the fuel filter

Disconnecting the fuel filter on your 1999 Subaru is a straightforward process, but it requires careful attention to safety precautions and a few simple tools. Here is a detailed guide to help you through the process:

Safety First:

Before you begin, it is crucial to take the necessary safety precautions. Place a shop towel or cloth around the fitting or connection to absorb any fuel spillage. Ensure you have a suitable waste container for any fuel-soaked cloths or towels. Keep a dry chemical (Class B) fire extinguisher nearby in case of any sparks or open flames.

Locate the Fuel Filter:

The fuel filter in your 1999 Subaru is located in the engine compartment on the left inside fender.

Relieve Fuel System Pressure:

Before disconnecting the fuel filter, you need to relieve the fuel system pressure. Refer to your repair manual or seek instructions specific to your Subaru model for this step.

Disconnect the Fuel Delivery Hoses:

Now, you can start disconnecting the fuel filter. First, remove the negative battery cable. Then, focus on the fuel delivery hoses. Loosen the hose clamps and carefully separate the hoses from the fuel filter. Use a small pair of pliers to grip and push the hose backward to remove it from the filter. Be cautious not to damage the hose. If needed, use a thin, blunt screwdriver to carefully loosen the connection further.

Handle the "IN" and "OUT" Hoses:

The "IN" (from the gas tank) and "OUT" (to the engine) hoses both connect via the top of the filter. Identify these hoses and their directions. The "OUT" hose is generally easier to deal with, so you may want to start with the "IN" hose. When removing the hoses, be prepared for fuel spurt or seepage by keeping the connection covered with a towel. You may also want to have some paper towels and rubber bands ready to create a "patch" over the hose ends to control the fuel flow.

Release the Fuel Filter from its Holder:

Once the hoses are disconnected, you can release the fuel filter from its holder or mounting bracket. There is usually a clasp that you need to release to detach the filter. Be careful not to drop or tilt the old fuel filter, as it will still contain fuel.

By carefully following these steps, you can successfully disconnect the fuel filter on your 1999 Subaru. Remember to have a helper nearby for added safety and to hand you tools and absorbents. Always refer to your repair manual or seek model-specific instructions for a comprehensive understanding of the process.

Install the new fuel filter

Now that you have removed the old fuel filter, you can install the new one.

First, take the new fuel filter and remove the hose-guider-thingie clip from the top and the gasket-cushion-thingie from around it, and transfer them to the new filter. Next, install the new fuel filter into its mounting bracket. Then, connect the fuel delivery hoses and tighten the hose clamps. Finally, reconnect the negative battery cable.

Remember, when you reconnect the negative battery cable, your car alarm will start screaming; make sure your helper is standing ready to turn it off. Before starting the car, turn the ignition to the ON position. You should be able to hear a 'whirring' sound, which will be your fuel pump working to re-pressurize. Wait about a minute, then before starting, go check for leaks. Now you can start the car and check for leaks again.

Frequently asked questions