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Geronimo, Normally the fuel lines run from gas tank, along frame rail, then up to fuel rail into injectors.
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If it idles smoothly. I might suspect the fuel filter. Spark plugs are also likely, but I would think you would see a misfire (blinking) CEL light if the plugs were causing misfires. Check that the air filter is clean and that there are no air leaks (cracked or ripped hoses) on the intake side. If you have any CEL codes, please post them.
you need a 5/8" wrench and a 7/8" wrench to undo the fuel lines from the filter, then a 10mm socket with extension and ratchet to undo the bolt that holds the filter bracket to the frame then you can change the filter. there is usually a flow arrow marked on the filter make sure its installed(filter) correctly.
If it runs when you spray starter fluid in you know the ignition system and all related systems are working. On an '86 you have an in-take electric fuel pump. You need to confirm that it runs and that it is supplying adequate fuel pressure in the system.
FUEL FILTER UNDER THE CAR NEXT TO GAS TANK.NOT HARD TO CHANGE BUT.YOU NEED.ADJUSTABLE WRENCH / IN LINE WRENCHES / AND NEEDLE NOSE PLIERS AND A REPAIR MANUAL.TO SHOW YOU THE PROCEDURES OF REMOVING THE FUEL FILTER.
The filter is right behind the fuel tank and is parellel to the tank is about three inches in diameter, first you have to diconnect the negative terminal of your batterie, second relieve the pressure on the system, to do so start you car and remove the fuel pump fuse your car will die shortly after. to remove the incoming line to the filter you may need a special tool that would be available from your dealer or posssibly a auto tool store, to remove the output line you will need two types of wrenches a large open end to hold the filter assembly and a flare nut wrench for the nut (it is very important to use the wrench on the filter body to prevent twisting your fuel line), you will have to remove the bracket for your filter also....Good luck!!