Fuel line plastic coupler leaking

If it's a 4x4 the filter is under the driver side door on the frame, if it's a 4x2 then the filter is ahead of the passenger side wheel on the frame. Pull the fuel pump fuse from under the hood and crank it over to relieve some fuel pressure and ensure that the fuel doesn't shoot out all over the place. Then unscrew the band clamp off of the filter. If the fuel lines have the plastic pin type retainers just pull the pins out and pull out the filter. If it has the metal auto-locking spring couplers then you need a 5/16" fuel line disconnect tool. Wiggle the line/filter, push the tool into the coupler all the way and turn and pull the fittings apart. Put the new filter back in with the flat end facing the rear and push the pins back in/push the couplers back on and re-tighten the band clamp. Put the fuse back in the under-hood fuse panel. Turn the key from off to run about 5 times to cycle the fuel pump and prime the lines. Check to see if there is any gas leaking and if there isn't start it up.

I don't know the above answer that I found can do for you or not. Good luck!

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autocom cdp pro car diagnostic

Removal Procedure
Important: Always maintain cleanliness when servicing fuel system components.
Important: There is no service interval for fuel filter replacement. Only replace a restricted fuel filter.
1. Relieve fuel system pressure. Refer to Fuel Pressure Relief . 2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.


3. Disconnect the quick-connect fitting at the inlet of the fuel filter. Refer to Plastic Collar Quick Connect Fitting Service . 4. Disconnect the threaded fitting at the outlet of the fuel filter. 5. Drain any remaining fuel into an approved gasoline container. Installation Procedure
1. Remove protective caps from new filter. 2. Install a new O-ring.


3. Connect the quick-connect fitting at the inlet of the fuel filter. Refer to Plastic Collar Quick Connect Fitting Service . Notice: Refer to Fastener Notice in Cautions and Notices.
4. Connect the threaded fitting at the outlet of the fuel filter. Tighten
Use a back-up wrench in order to prevent the fuel filter from turning. Tighten the fuel filter outlet nut to 27?N·m (20?lb?ft).
5. Lower the vehicle. 6. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical. 7. Inspect for fuel leaks. 7.1 Turn ON the ignition for 2?seconds. 7.2 Turn OFF the ignition for 10?seconds. 7.3 Turn ON the ignition. 7.4 Inspect for fuel leaks.

Fuel Filter Removal & Installation To Remove:
NOTE: There is no maintenance schedule for fuel filter replacement. Replace the fuel filter if restricted. Inspect the fuel tank internally if you find a restricted fuel filter.
Typical inline fuel filter

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Relieve the fuel system pressure.
3. Raise and safely support the vehicle.
4. Remove or disconnect the following:
   • Quick connect fitting at the fuel filter inlet
   • Fuel filter outlet fitting from the fuel filter while holding the filter fitting with a back-up wrench
   • Fuel filter from the vehicle
   • Fuel line O-ring.

To Install:

1. Position the new fuel filter in the bracket.
2. Install a new plastic retainer on the fuel inlet line.
3. Lubricate the new fuel pipe O-ring with clean engine oil.
4. Install the fuel pipe O-ring.
5. Reconnect the fuel outlet line to the filter by holding the filter with a back-up wrench and tightening the line fitting to 20 ft lbs (27 Nm).
6. Lower the vehicle.
7. Pressurize the fuel system and check for leaks.

Fuel Filter (behind gas tank) Removal & Installation To Remove:
NOTE: There is no maintenance schedule for fuel filter replacement. Replace the fuel filter if restricted. Inspect the fuel tank internally if you find a restricted fuel filter.
Typical inline fuel filter

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Relieve the fuel system pressure.
3. Raise and safely support the vehicle.
4. Remove or disconnect the following:
   • Quick connect fitting at the fuel filter inlet
   • Fuel filter outlet fitting from the fuel filter while holding the filter fitting with a back-up wrench
   • Fuel filter from the vehicle
   • Fuel line O-ring.

To Install:

1. Position the new fuel filter in the bracket.
2. Install a new plastic retainer on the fuel inlet line.
3. Lubricate the new fuel pipe O-ring with clean engine oil.
4. Install the fuel pipe O-ring.
5. Reconnect the fuel outlet line to the filter by holding the filter with a back-up wrench and tightening the line fitting to 20 ft lbs (27 Nm).
6. Lower the vehicle.
7. Pressurize the fuel system and check for leaks.

The fuel filter is mounted on the floor pan just in front of the fuel tank Use compressed air or carburetor cleaner to clean any dirt surrounding the fuel inlet and outlet line fittings. Once all the dirt has been removed, twist the two lines a quarter-turn in opposite directions to loosen the fitting. Depress the white plastic quick-disconnect tabs and detach the inlet line from the fuel filter (see illustration [see comment below marked "#2"] ). Note: Have spare rags or a small container to catch or wipe up extra gasoline that will spill from the filter assembly. Use an open end wrench to steady the outlet side of the filter and a flare nut wrench to unscrew the fuel line nut, then separate the outlet line from the filter while noting the installed position of the O-ring. Using a flare nut wrench will help to avoid rounding the corners off of the fuel line nut. Detach the fuel filter mounting bracket bolt and remove the fuel filter. Installation is the reverse of removal. Note: Be sure to install a new O-ring on the outlet line before reassembling. "Squeeze the white plastic quick-disconnect tabs together and pull the inlet line (A) away from the filter, then detach the outlet line (B) from the fuel filter - unbolt the filter mounting bracket to remove the fuel filter".

• Relieve the fuel system pressure
  
• Raise the vehicle and support it securely on jack stands.
• The fuel filter is mounted on the floor pan just in front of the fuel tank
• Use compressed air or carburetor cleaner to clean any dirt surrounding the fuel inlet and outlet line fittings.
• Once all the dirt has been removed, twist the two lines a quarter-turn in opposite directions to loosen the fitting. Depress the white plastic quick-disconnect tabs and detach the inlet line from the fuel filter
• Note: Have spare rags or a small container to catch or wipe up extra gasoline that will spill from the filter assembly.
• Use an open end wrench to steady the outlet side of the filter and a flare nut wrench to unscrew the fuel line nut, then separate the outlet line from the filter while noting the installed position of the O-ring. Using a flare nut wrench will help to avoid rounding the corners off of the fuel line nut.
• Detach the fuel filter mounting bracket bolt and remove the fuel filter.
• Installation is the reverse of removal. Note: Be sure to install a new O-ring on the outlet line before reassembling."The fuel filter (arrow) is located underneath the vehicle in front of the gas tank".
• "Squeeze the white plastic quick-disconnect tabs together and pull the inlet line away from the filter, then detach the outlet line from the fuel filter - unbolt the filter mounting bracket to remove the fuel filter".

Hopefully this helps a bit, good luck and be safe.

could either be coupler on end of line, or the nipple on fuel fitler. THe coupler should have rubber o-ring inside as well.

On buick LeSabre the fuel filter will be under the car passenger side just in front of the rear tire . Follow the fuel line and you will find it there.

Fuel Filter Removal & Installation To Remove:

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Disconnect the negative battery cable.
3. Relieve the fuel system pressure.
4. Raise and support the vehicle.
5. Disconnect the plastic quick connect from the fuel filter inlet.
6. Unthread the fuel filter from the outlet pipe.
7. Drain remaining fuel into a gasoline container

To Install:

1. Remove the new fuel filter protective caps.
2. In the same position as on the old fuel filter, install the new plastic connector retainer on the fuel filter inlet.
3. With clean engine oil lubricate the new fuel pipe O-ring and install it on the outlet pipe.
4. Connect the fuel filter inlet to the quick connect fitting.
5. Thread the fuel filter into the fuel outlet line, and using a back-up wrench prevent the nut from turning torque to 22 ft-lb (30 Nm).
6. Lower the vehicle.
7. Install or tighten the fuel cap.
8. Connect the negative battery cable.
9. Check for leaks using the following procedure:
   1. Turn ON the ignition for 2 seconds.
   2. Then OFF the ignition for 10 seconds.
   3. Turn ON the ignition.
   4. Inspect for fuel leaks.
10. Install the fuel injection sight shield.