The assembly also has a spring float, which prevents liquid fuel from entering the vapor delivery system under severe handling or vehicle rollover conditions. It is used to control the flow of fuel vapors entering the evaporative system. The fuel vapor control valve assembly is mounted on the top of the fuel tank. It seems like your mechanic believes that your problem is caused by a defective fuel vapor control valve. We know that the fuel tank won’t vent because you said that it is really slow to fill the fuel tank. The vapors drawn off of the carbon in the evaporative canister are consumed in the engine. This routes the fuel tank vapors that are displaced by the incoming liquid to the evaporative canister.īetween refueling events, the evaporative canister is purged with fresh air so that it may be used again to store vapors accumulated during engine soaks or subsequent refueling events. Fuel vapor tubing connects the fuel vapor control valve to the evaporative canister. This limits the total amount of fuel that can be dispensed into the fuel tank. The fuel vapor control valve controls the flow of vapors out of the fuel tank by closing when liquid level reaches a height associated with the fuel tank usable capacity. The fact that you said that it is really slow to fill the fuel tank and there are leaks from the top of the fuel tank when full and the car isn’t running, would lead me to believe that you have either a defective fuel vapor control valve, fuel vapor vent valve or a fuel saturated evaporative canister. I also read that a member sealed a similar leak with Q-Bond. A little more info, it has not thrown a code yet. Oh, I tried to run a bore scope on the tank top, but had little success. The only permanent fix, I know of, is to melt some new HDPE plastic or replace the entire tank. I’m confident the vapor valves are therm-welded and not set in grommets. After it leaks down (tank level gauge still reading full) then the leak stops. There are no apparent leaks with the car running and It only leaks when the tank has just been filled. The leak is coming from the very tip top of the tank and then running down to the fuel pump access level. I removed the shelf behind the seats to reveal the top of the fuel pumps.The pump seal rings are fluid tight and not leaking. Seeking knowledge on the fuel cell (tank) composition, is it HDPE or some other plastic? I’m fairly sure I have a fuel leak at one of the vapor valves on the top of the tank. As a matter of fact, someone already stated how they fixed your problem. Moderator note: Your are more likely to get an answer by replying to a thread that is exactly the same problem rather than creating a brand new thread. New Thunderbird fuel tanks are no longer available and have been ‘obsoleted’ by Ford and out of production for many years.Trying not to hi-jack a thread, so started this one. Also please note we are offering USED fuel tanks. Please view the comparison photos on this page to see the specific differences. The 2002 Thunderbird fuel tank is NOT compatible with the 2003-2005 version. Please specify model year for your Thunderbird as the fuel tank is model year specific. This is a genuine Ford part, is the fuel tank only and does not include the fuel pumps or other separate accessories.ĭue to the size and dimensions, this product requires special crating & shipping via truck freight.
We offer used fuel tanks in excellent condition and guaranteed 100% intact and undamaged filler neck connection. The most common reason for replacement of the filler neck assembly was never available as a separate part, but only as part of the entire fuel tank assembly. 2002-2005 Thunderbird Fuel Tank – Ford ‘Obsoleted’ and discontinued manufacture of new OEM Fuel Tanks for the 2002-2005 Thunderbird over ten years ago, and there is no new ‘new old stock’ available anywhere, nor is there an aftermarket alternative.