Re: can not dissengage the fuel lines from sending unit
Real simple-If you have a plastic looking tab ,you push line on tight and push on tab toward fitting. Do not try to pry it away or off, with a screw driver or it breaks
If you have what I think your trying to remove, it is called a Spring Lock Coupling
You go to Auto Parts Store and tell them what size the fitting is,and buy the removal tool.
It opens and wraps around the coupling,then you squeeze together and pull hoses apart.
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Make sure no fuel pressure on the system before taking anything loose. Usually if the vehicle sits overnight w/o the key being cycled, there isn't much if any pressure on the system, but, you still need to be aware. You could disable the fuel pump, then start the vehicle, that should drain the system. There other ways.
The filter should be toward rear of engine, driver side, under vehicle, attached to frame-rail. Hair-pin clips holds the fuel line, hopefully you can use your fingers to pull hair-pins back enough to remove fuel line and filter.
If your dealing with gasoline, there is a fire hazard, be safe, safety is your responsibility.
The fuel filter is mounted on the frame rail. There are two types of fittings used. You only need to look at the fittings to tell the difference.
There is the plastic "hair pin" type of connector. It has a plastic connector with a plastic "hairpin" clip that pushes through the connector. Just pry the clip out with a screwdriver don't worry about breaking the clip, the new filter should come with new clips. Be careful not to break the fitting though. If you break the connector, you must replace the fuel line...not fun.
The other type is what Ford calls the "Duckbill" type of connector. I don't know wht it is called that...it doesn't look like a duck bill to me. Anyway., you can identify this one as a stainless steel connector. there is usually also a stainless steel lock clip that goes over the outside of this type of connector. The lock clip can be pried up and removed with a screwdriver. Once the lock clip is removed, a special fuel line disconnect tool must be used to releasethe spring clips inside the connector. the tool canbe purchased for a couple dollars at any parts store where you would buy your fuel filter.
You need to look at the car to determine if you need the tool or not. Both types of connectors are used for the same fuel filter. Plastic connectors - no special tool needed. Stainless steel connectors - special tool required.
This line has to be hooked up for gas to go back to the tank. Gas gets sucked out of the tank then through the engine and then the excess has to return to the tank. This keeps air bubbles out of the system after it runs dry.
"Under the vehicle drivers side on the frame rail under the driver side
door. There is frame right underneath it but you can access it easily.
Be sure to release the fuel pressure before changing the filter. The
fuel pressure release valve is located in the engine compartment on top
of the engine. It is on the left side of the air intake manifold. It is
just a small cap over the valve. Be sure not to lose that cap!!
When you change the filter, the filter line on each side of the
fuel filter has a quick disconnect type fitting inside the line
(similar in principle to a quick disconnect on a gas line or air
compressor line). To free the filter from the line you must push in
(toward the filter) with a simple tool you can purchase at most auto
parts stores for just a few dollars.
The tool I was able to rent from NAPA. The guys there were very good
to me. Look for about 45 min. of time to complete replacement.
While first off your going to need to relieve the pressure in
the system, and if you think your going to just pull the fuel pump
relay and then run the engine until it stops to relieve pressure it
aint gonna work. Get a bleeder gauge. Your also gonna need a quick
disconnect tool. Ford models are usually 1/4" 3/8" or 15/16". Put it on
the fuel pump right before the "duck bill" then try to push the line
foward. If that doesn't work just try to push the tool into the duck
bill then try to push the line foward."