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There is a vent on some fuel tanks. As gas gets heated, either from the afternoon heat or from driving, it expands. If your tank is full or close to it, the vapors can escape through the filler tube or some have another vent tube near the filler tube
disconnect battery before any work around fuel and or fuel tank ---jack up and support truck -loosen but dont remove the tank straps disconnect the filler tube from tank you will now be able to run a siphon hose into tank -siphon gas into approved gas containers in a well vented area
The fuel pump is located inside the fuel tank. If you have a major leak, there are a few things it could be. The filler tube you put gas into during a fill-up goes directly to the fuel tank. The filler tube may have a hole in it; If your tube is rubber, the clamp at the fuel tank may need replaced; you may have a fuel line leaking near the fuel tank, The fuel tank may have a hole in it. A fuel leak is a hazardous situation, so take extra precautions to be safe and have it repaired asap.
TO REMOVE FUEL TANK YOU FIRST RELIEF FUEL PRESSURE.THEN YOU RAISE THE VECHICLE AND SUPPORT ON JACK STANDS.THEN YOU DRAIN FUEL OUT OF FUEL TANK.YOU CAN GO TO ANY AUTO PARTS STORE BUY A SIPHON.DONT SIPHON GASOLINE WITH YOUR MOUTH.SWALLOWING GAS AND FUMES COULD BE FATAL.WHEN ALL FUEL OUT THE FUEL TANK.REMOVE THE FUEL FILLER.DISCONNECT THE ELECTRICAL WIRING TO FUEL TANK.THEN DISCONNECT ALL THE HOSES FROM THE FUEL TANK.PLACE A LARGE FLOOR JACK CENTER OF THE FUEL TANK.PLACE A PIECE PLY WOOD OVER FLOOR JACK LIFTING SADDLE TO KEEP FROM PUTTING A HOLE IN FUEL TANK.START RAISING FLOOR JACK UNTIL SADDLE TOUCH GAS TANK JUST ENOUGH TO HOLD TANK IN PLACE.THEN YOU REMOVE FUEL PUMP SUPPORT STRAP BOLTS DROP FUEL TANK DISCONNECT FUEL SUPPLY AND RETURN HOSES AND DISCONNECT FUEL VAPOR LINES FROM PRESSURE RELIEF ROLLOVER VALVE.THEN REMOVE TANK.IF HAVE TROUBLE REMOVING FILLER TUBE AT GAS TANK SPRAY WD40 AROUND WHERE FILLER TUBE GOES TO GAS TANK LOOSEN THE CLAMPS AND USE LARGE VISE GRIPS WORK FILLER TUBE HOSE AWAY FROM FUEL TANK SPRAY WD40 INTO IT SLIDE ON OFF.WHEN YOU GET FUEL TANK OFF USE A FUEL PUMP MODULE LOCK RING TOOL TURN LOCK RING COUNTERCLOCK WISE.IF YOU DONT HAVE THE FUEL PUMP LOCK RING TOOL.YOU CAN USE A HAMMER AND BRASS DRIFT OR A PLASTIC DRIFT DONT USE NO METAL DRIFTS OR PUNCH YOU WILL MAKE A SPARK AND HAVE EXPLOSION FROM GAS FUMES BE EXTRA CAREFUL.REPLACE FUEL PUMP SOCK AND FUEL SUPPLY LINES IF STOPPED UP AND REPLACE FUEL FILTER.PUT EVERY THING BACK IN VISA VERSA.IF ALL GOES WELL. GO TO AUTO PARTS STORE BUY A GAS CAP WITH A LOCK SO WHO EVER PUT SUGAR IN YOUR GAS WONT BE ABLE TO TRY IT AGAIN GOOD LUCK.
Ford Contours have a cheap plastic "flapper valve" at the bottom of the filler neck which supposedly prevents fuel from sloshing back up the neck while fueling. This valve is useless and was never lneeded. When it sticks closed it will make fueling difficult if not impossible. Solution - simply find a heavy cable and push it down the filler neck until it reaches the valve. Give it a heavy rap...sometimes you have to keep doing it over and over until it breaks off the flapper valve. The flapper valve will then float in the tank and will not cause problems. It's a miracle cure that costs nothing. I believe I used a drain snake that I bought at home depot and cut off the large end to do the job. I haven't had a problem with this solution in the past 3 years.
YOU will need the car on a hoist, doing it on the ground is almost impossiable, disconnect the filler neck at top, remove the straps, lower tank slow and disconnect wiring and fuel hoses, you need a special tool to remove the gas line retainer clips.