How To Replace Your Fuel Filter
On a 1998 Mustang GT
Menu
Learn about the fuel filter
About the process
How to install the fuel filterPress the Home icon to return to the beginning.When the Shift Handle icon appears, you have reached the end of that section. Press the Shift Handle icon to return to the menu.
What is a fuel filter?A fuel filter is a filter that traps dirt,
particles, and other contaminants
found in your gasoline. Without the
fuel filter these impurities can
potentially clog your fuel injectors or
damage your engine.
How do I know when it needs to be replaced?
If your fuel filter needs to be replaced, your car will have
some of the following symptoms:
ORough idle
OHesitation when starting
OSlow acceleration
OEngine stall
OCar won’t start
*Important: Your car’s fuel filter should be replaced every
30,000-40,000 miles
Where can I buy a fuel filter?
What if I take it to my dealer?
If you are thinking about going to your local dealer or
mechanic, consider this first:
O A dealership or mechanic shop will charge you by the
hour for labor. (Usually between $69-$99 per hour)
O If labor is less than an hour you will still be charged a
minimum rate. (Usually a 30 minute to 1 hour minimum)
O They can charge a higher price for the part and add fees
for parts delivery. (The fuel filter for this demo was
bought at AutoZone for only $10!)
What do I need?• 2 ton Jack
• Two 2 ton jack stands
• Flat head screwdriver
• Mechanics gloves (optional)
• Safety Goggles
• New fuel filter
• Old rags or towels
• Fuel line disconnect tool
How long will it take? Generally, the process takes about 20
minutes or less. But if your Mustang’s
filter has never been replaced and still
has the original fuel filter then it may
take longer because of the dirt and
contaminants that cause the filter
ends and fuel lines to stick.
Unplug inertia switch…1. Open your trunk.
2. Pull back your carpet.
3. Locate the Inertia switch on the left side of the trunk behind the tail light.
4. Use your flat head screw-
driver to carefully pry the
clip that is on the plug.
5. Pull down while prying to
disconnect the switch.
Jack up the car…1. Make sure you are parked
on flat, even ground.
2. Pull your emergency brake. If your Mustang has a manual transmission put it in gear as well.
3. Use the 2 ton jack to lift your car. A good lifting point is right underneath the differential.
4. Lift high enough to put a jack stand on each side.
5. Place the jack stands on the frame of the car. Lower the jack so now your car rests only on the stands.
Release fuel pressure…1. Unscrew the fuel cap to
the gas tank.
This will release the fuel pressure and keep you from getting sprayed with gas when you disconnect the fuel lines.
Disconnect fuel lines…1. Crawl under the car with
your fuel line disconnect tool, safety goggles, old rags, and gloves (optional).
2. Right behind the gas tank you will see the fuel filter clamped down and connected to two fuel lines. (Right side is already disconnected in picture.)
3. Place the snouted end of the disconnect tool inside the open end of where the fuel line and fuel filter meet.
Disconnect fuel lines…4. Make sure you are
wearing your goggles and have your old rags ready to catch any gas that may spill. The goggles will protect you from any gas and dirt that will fall from the lines as you disconnect them.
5. Now you are ready to pull the disconnect tool in the direction of the ends. For example, if you start with the fuel line on the left, insert the tool and push left while pulling the filter right.
Unscrew the clamp…1. Use your flat head screw-
driver to unscrew the adjustable clamp that holds in the fuel filter.
2. Make sure you are wearing your goggles to protect your eyes from dirt and contaminants.
Remove the old filter…1. Once you loosen the
adjustable clamp, slowly push the filter up.
2. Keep in mind, dirt and gas are still inside the filter so take caution and use your rags to catch any spills if necessary.
Place new filter in clamp…1. Crawl under the car
with your new filter, goggles, and gloves (optional).
2. You are simply going to reverse the steps completed to remove the old filter.
3. But before you do, find the printed arrow on the filter. This helps you know which way it needs to be installed. The arrow is pointing right, indicating to connect that end to the fuel line on the right.
Reconnect the fuel lines…1. Connect both ends of
the fuel filter to their corresponding fuel line. You will hear a clicking sound once they are securely connected.
2. Lower the car.
3. Reconnect the inertia switch.
4. Put the gas cap back on to regain fuel pressure.
Turn on fuel pump…1. Insert the key into the
ignition in the “ON” position but DO NOT START THE CAR.
2. Without removing the key, turn the key towards you. Now turn it back to the “ON” position and hold for about 10 seconds. Do this 3 times.
3. Now start the car and check the idle. Make sure it is in normal range.
4. With car running, look under car and check for any gas leaks.