Can You Place A Gas Fuel Filter Before The Fuel Pump

Changing the filter on a fuel-injected vehicle can be tricky. On fuel-injected vehicles, you need to disable the fuel pump to relieve the pressure on the fuel lines, which may exist secured to the filter with clamps, threaded fittings, or special quick-connect fittings.

Lines with threaded fittings crave 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 the service department at your dealership which blazon of filter your vehicle has.

If doing this infrequent job requires purchasing special tools, it'due south probably cheaper to have it done by a technician. If not, the first thing you need to do is find the filter. Your owner's transmission should show yous where your fuel filter is and whether in that location'due south more than one on your vehicle. If it doesn't, ask someone in the service department at your dealership or consult a service manual for your vehicle's brand, model, and twelvemonth. (Although it's a good idea to ain one, you tin usually discover these manuals at your local library.)

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

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

A fuel filter located under the vehicle well-nigh the fuel tank

Or under the hood in the fuel line near the engine, as shown here:

A fuel filter in the fuel line under the hood.

A fuel filter in the fuel line under the hood

Some vehicles besides accept a fuel filter in the fuel pump as well as a filter screen inside the fuel tank. If they go blocked upwardly, merely a professional person should deal with them.

Here are pace-past-step instructions for changing a fuel filter. Before you get started, read them carefully and make sure that you want to practice this job yourself.

Save the pressure in the fuel line before disconnecting it. To do and so, you take to disable the electric fuel pump before you start the engine.

To disable the fuel pump, do the post-obit:
1. With the engine off, remove the fuel pump fuse from the fuse box. (Your owner'south manual should prove you where it is.)
2. Make certain that the parking brake is on and that the vehicle is in Park or Neutral, so start the engine. It won't run very long after y'all start it up, but the pressure level in the fuel lines will be reduced.
3. Turn off the engine. With the fuel pump disabled, you're ready to disconnect the fuel lines from the filter.
Look at the onetime filter and the new one earlier disconnecting anything.

Y'all should see an pointer stamped on both filters that shows in which direction the fuel flows through it. If the new ane doesn't have an pointer on it, look to see in what management the old filter is installed and so that you can tell which terminate of the new filter goes where.
Remove any is holding the onetime filter in place and remove it.
Put the new filter on in the aforementioned position as the former filter.
Supplant any holds the filter in identify, and make sure information technology'southward secure.
Replace the fuse for the fuel pump in the fuse box.

Brand sure that the parking brake is on and that the vehicle is in Park or Neutral, and then start the engine and check for leaks around the filter.