Replacing Your F-150 Fuel Filter: Step-By-Step Guide

Replacing the fuel filter in your Ford F-150 is a simple task that can save you money and improve your vehicle's performance. This basic maintenance procedure involves relieving the pressure from the fuel system, removing the old fuel filter, replacing it with a new one, and resetting and testing the new filter. It is important to prioritise safety during this process, including releasing the fuel pressure in the fuel line to avoid fuel spray.

Relieve the pressure from the fuel system

To relieve the pressure from the fuel system of your Ford F-150, start by removing the fuse cover located under the hood on the driver's side. The next step is to trip the inertia fuel reset switch, which is red. This is one of the few maintenance routines you should perform with your engine running. Disable the switch by tapping it in the middle with a rubber mallet. You will know you have been successful when the motor gives out.

Before starting, it is important to note that you must release the fuel pressure in the fuel line or gas will spray everywhere. On the passenger side of the fuel rail (on the engine), there is a Schrader valve that you can depress to depressurize the lines.

This process is important for safety reasons. It is recommended that you NEVER do this with a hot engine. ALWAYS use eye protection and DO NOT smoke while performing maintenance on a fuel system.

Remove the fuel filter

To remove the fuel filter from your Ford F-150, follow these steps:

Firstly, locate the fuel filter. It is situated on the inside of the frame rail on the driver's side of the truck, just under the cab. Before you begin, it is important to relieve the pressure from the fuel system. Do this by removing the fuse cover located under the hood on the driver's side and tripping the inertia fuel reset switch, which should have a red rubber top. This is one of the few maintenance routines that should be performed with the engine running. Disable the switch by tapping it in the middle with a rubber mallet.

Now, to remove the fuel filter, start by unhooking the metal retaining clip. Position the line compression removal tool so that it rests on the front end of the filter. Apply a small amount of pressure and slide the tool into the line fitting until it slides off. Keep towels handy, as fuel tends to spill out during this step. Repeat this process at the rear of the filter, applying as little pressure as possible. Once both ends of the line fitting have been removed, use a flat-blade screwdriver to disconnect the dirty filter.

At this point, you will want to emphasise safety. Always wear eye protection and do not smoke while performing maintenance on a fuel system.

Now, you can move on to removing the fuel line from the inlet side of the filter. Place a dust cap from the new filter over the discharge end of the old filter to control any mess. Try to move the fuel line so that it is raised to minimise fuel leakage.

Finally, you can start to install your new filter.

Replace the filter

Now that the fuel filter is disconnected, you can replace it with a new one. Get a new fuel filter for your Ford F-150 and ensure that it is securely placed in the bracket. Check that the flow arrow on the new filter is pointing towards the front end of your truck.

Next, reconnect the fuel lines to the new filter. You should listen out for a clicking sound and feel a click to indicate that the fuel lines are properly connected. Once the fuel lines are connected, you can reattach the safety clips.

Now, turn the key in the ignition on and off a few times without starting the engine. This will get the air out of the lines. You will hear the fuel pump make an abnormal sound for the first few turns, but this is normal and will go away after a few turns of the key.

Finally, start the truck and let it run while checking your fittings for any leaks. Keep the engine running while testing out your new filter.

Reset and test

With the new filter in place, you are free to reset the inertia switch by clicking the red button once more. Cycle the ignition a few times before checking for leakage and remember to keep the engine running when testing out your new filter.

Before you start the engine, make sure to put the fuse cover back on.

It is important to note that you must release the fuel pressure in the fuel line or gas will spray everywhere. To do this, locate the Schrader valve on the passenger's side fuel rail (on the engine) and depress it to de-pressurize the lines.

Now, start the engine and check for any signs of leakage. Remember to keep the engine running while testing the new filter.

Safety precautions

When replacing the fuel filter in your Ford F-150, there are several safety precautions you must take to ensure your well-being and avoid damage to your vehicle. Here is a detailed list of safety instructions:

Engine Temperature:

Never attempt to replace the fuel filter with a hot engine. Allow the engine to cool down before starting the procedure. This precaution is crucial to avoid the risk of burns or other heat-related injuries.

Eye Protection:

Always wear appropriate eye protection gear, such as safety goggles or a face shield. There is a risk of fuel splashing or spraying during the process, and any contact with your eyes can cause serious injury. As mentioned in one guide, even a small amount of gasoline in the eye can be extremely painful and harmful.

No Smoking:

Under no circumstances should you smoke while performing maintenance on your fuel system. The presence of flammable liquids and potential fuel vapors creates a highly hazardous situation. Smoking in such an environment poses a severe risk of fire or explosion.

Fuel Pressure Release:

Before beginning any work on the fuel filter, it is essential to release the fuel pressure in the fuel line. This can be done by depressing the Schrader valve on the passenger side fuel rail to de-pressurize the lines. Failure to do so may result in fuel spraying everywhere when you disconnect the fuel lines.

Towels and Spill Control:

Keep a good supply of towels or rags handy during the process, as fuel tends to gush out when you remove the fuel filter. Additionally, always control the mess by placing the dust cap from the new filter over the discharge end of the old filter to minimize fuel leakage.

Tools:

Use the correct tools for the job, such as the line compression removal tool and a flathead screwdriver. These tools help ensure a safe and proper disconnection of the fuel lines and filter.

Engine Running:

Relieving the pressure from the fuel system is one of the few maintenance routines you should perform with the engine running. This step is crucial for your safety and the proper functioning of the fuel system.

Inertia Fuel Reset Switch:

Locate the inertia fuel reset switch under the hood on the driver's side, and disable it by tapping it in the middle with a rubber mallet. This step is essential for relieving fuel pressure and ensuring the engine shuts down properly.

Fuel Leakage Check:

After installing the new fuel filter and resetting the inertia switch, cycle the ignition a few times and check for any fuel leakage. Keep the engine running during this test.

Work Area Ventilation:

Ensure that the work area is well-ventilated to prevent the buildup of fuel vapors, which can be hazardous. Open doors or work in an outdoor setting if possible.

Fire Extinguisher:

Have a fire extinguisher nearby as a precautionary measure. In the event of a fuel spill or fire, you'll be able to act quickly and efficiently.

Read Instructions:

Before performing any maintenance or repair work, it is essential to read and understand all the instructions provided by the manufacturer or a trusted source. This will help you identify any additional safety precautions specific to your vehicle's make and model.

Frequently asked questions