Making Sure That Your Fuel Filter Is Alright

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Changing the filter on a fuel-injected vehicle might be tricky. On fuel-injected vehicles, you need to disable the fuel pump to ease the pressure about the fuel lines, which may be secured to the filter with clamps, threaded fittings, or special quick-connect fittings. Lines with threaded fittings require a special flare-nut line wrench. Lines with special quick-connect fittings may require special tools to disconnect them. Ask the clerk at an auto parts store or even the service department at your dealership which type of filter your vehicle has.

It’s probably cheaper to have it completed by a technician if achieving this infrequent job requires purchasing special tools. If not, the first thing you need to do is find the filter. Your owner’s manual should show you where your fuel filter is and whether there’s more than one on your vehicle. If it doesn’t, ask someone in the service department at the dealership or consult a service manual for your personal vehicle’s make, model, and year. (Although it’s smart to own one, you can usually find these manuals at the local library.)

Your fuel filter is located somewhere in the high-pressure fuel line, either under the vehicle near the fuel tank as shown here, if your engine has fuel-injection:

A fuel filter located under the vehicle near the fuel tank.

A fuel filter located under the vehicle near the fuel tank.

Or within the hood inside the fuel line near the engine, as shown here:

A fuel filter in the fuel line underneath the hood.

A fuel filter in the fuel line within the hood.

Some vehicles furthermore have a fuel filter in the fuel pump in addition to a filter screen inside the fuel tank. If they get blocked up, only a professional should deal with them.

Here are step-by-step instructions for changing a fuel filter. Read them carefully and make sure that you want to do this career yourself, prior to getting started.

Relieve the pressure in the fuel line before disconnecting it. To do so, you will need to disable the electrical fuel pump before you start the engine.

To disable the fuel pump, do the following:

With the engine off, take away the fuel pump fuse from the fuse box. (Your owner’s manual should show you where it is.)

Ensure that the parking brake is that and so on the vehicle is within Park or Neutral, and after that start the engine. It won’t run very long when you start it, but the pressure in the fuel lines will probably be reduced.

Turn off the engine. With all the fuel pump disabled, you’re ready to disconnect the fuel lines in the filter.

Check out the old filter and the a different one before disconnecting anything.

You must see an arrow stamped on both filters that shows in which direction the fuel flows through it. In the event the new one doesn’t have an arrow on it, look to see in what direction the old filter is installed so that you can tell which end of the new filter goes where.

Remove whatever is holding the existing filter set up and remove it.

Put the new filter on in the same position as being the old filter.

Replace whatever holds the filter in place, and make certain it’s secure.

Replace the fuse for that fuel pump in the fuse box.

Make certain that the parking brake is that and so on the vehicle is at Park or Neutral, and after that start the engine and check for leaks around the filter.