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Re: Gas tank leak
Check the tank by the trunk. In other words, lift the floor in ur trunk, the tank cover (about 6 inches in diameter and same color as the car) should be right there under a plate with three screws. Open that with a phillips head screwdriver (star) and check if u see gas there, maybe the gasket (more like an o ring) is no more good. U will have to unscrew that big white plastic bolt there but check to make sure the two gas lines are snug and secure in their place first.
VW's have plastic gas tanks, therefore not rusted or punctured( highly unlikely)
If this doesn't help, lemme know and ill tell u how to remove the gas tank.
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Both the fuel pump and gas gage sending units are located inside the tank. They are accessed by a plate and gasket on top of the fuel tank.
If the gasket leaks or the hoses leading to the vent leak, your condition would happen. Unfortunately to confirm the tank would have to be dropped(removed) which requires all the fuel to be removed first. Not a pleasant nor easy task.
Could be a small gas leak in one of the gas lines or even a leak on top of the gas tank and yes could even be a leak where the fuel pump goes in the top of the tank. Quite often the leak is on the tank top out of sight and it smells of gas even if you have a slight leak.
There are two hoses running from the filler neck. Either of them could be leaking from the top. There is also a seal on the top of the tank where the fuel pump is that can leak. If your car leaks the whole time you are putting fuel in, I would suspect the hoses. If it only leaks when you get it full, then check the seal on the top of the tank. The top of the tank can be seen without dropping the tank. Remove your back seat and you will see a cover over the fuel pump. Remove that cover and you can see the top of the tank.
Not knowing your milage or what part of the country you live in if they use salt on the roads. The leak is coming form the three fuel lines going into the gas tank and fuel pump. The fuel pump is inside of the gas tank secured by a large slip ring seal. From the years gone by these lines rust and since they are under pressure they will leak through. You will have to drop your gas tank to get to this. This is a ugly all day expensive job. Replace the fuel pump which comes with the new seal and fuel lines assembly.
I could sit here and tell you the step by step procedure but that will take hours. The very best thing you can do is buy a Haynes repair manual for your car and year at any auto parts store @ Advanced, Autozone. Read the step by step in the manual. I have used these for 40 years with all my vehicles and saved tons of cash in labor costs. Be prepared to replace the gas tank straps and additional fuel lines depending on how bad the rust is.
Good luck and thanks for your question and I hope my suggestions help. Don't forget to rate me. burdfrenzy
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on a dodge neon the fuel pump is in the SIDE of the tank... NOT the top. to remove the pump follow these steps... ******* first unplug battery and remove ******** 1. unbolt passenger side tank strap and lower side of tank. 2. a. if tank is plastic, CAREFULLY unscrew plastic retainer ring but do NOT remove. b. if metal tank, unscrew metal retainer flange but do NOT remove 3. unplug electrical connector and fuel line from pump. move aside. 4. completely remove retainer BE CAREFUL not to disturb pump. 5. have drain pan or wide-shallow bucket available to collect gas. (if tank is full this will need to be able to hold 7-8 gallons) 6. gently twist and pull pump out till gas comes fourth. catch gas in pan/bucket. 7. remove pump when gas stops flowing. 8. install is reverse of removal. 9 BE CAREFUL not to wrinkle gasket or lose gasket into tank when installing or the tank will leak around pump. 10. tighten retainer but DO NOT OVER TIGHTEN. 11. reconnect plug and fuel lines check for leaks. 12. reattach tank strap and fasten 13. refill tank with clean gas. check for leaks. 14. put battery back in. connect battery, start your neon and check for leaks one last time. 15, have fun. this will take about 4hrs to do by yourself with proper tools.
REMOVE TANK, ALSO FUEL PUMP. UR PUMP IS STILL GD, U MAY BE ABLE TO STILL BUY THE ASSEMBLY . USE UR OLD PUMP. IF NOT, GET 1 AT THE WRECKERS, SAVE A LOT OF $$$$$$, KEEP UR OLD PUMP FOR FUTURE PUMP PROBLEM, CHARLIE
If your gas tank is cracked or has a hole in it, you have to drain the tank, remove the gas tank and replace it, or have it repaired (if possible). If the gas tank is just leaking from the top and dripping along the side and to the bottom, you will still have to empty the gas tank, and remove it to get a good look at the condition of the gasket. It is not uncommon for these gaskets to become cracked or fragile over time because of the harsh chemicals and cleaning agents used in unleaded gas. If you do decide to have the gas tank removed, I would recommend replacing the fuel pump and fuel filter if your car has high mileage. Please rate this response if you found this helpful.
if the gas is leaking from the top of the tank, 10 to 1 it's either the fuel line, or the top part of the sending unit which is probably made of plastic, is cracked where the fuel line connects to.The tank should be empty or near it, easier to drop, loosen the tank strap bolts towards the front, then remove the rear ones one at a time, as you take the last rear bolt out, the tank should drop a little. Becarful of the wire connection and fuel line, drop it slowly enough to reach in and disconnect them.If the unit has a plastic hose connection, it needs replacing. good luck.