Ford purge valve stuck wide-open. I've seen a lot of EVAP system problems, but never one like this at 00:28. This Ford truck got stuck in purge mode thanks to a defective purge valve. https://www.fixmyoldride.com/vapor-canister-purge-problems.html I put together this page that discusses some common vapor canister purge problems on Ford and Chevrolet products. On this car, when the purge circuit malfunctioned, it applied so much vacuum to the gas tank that an odd noise would come from the spring-loaded fill valve. It also caused the engine to run rough and a dent in the bottom side of the fuel tank.
Of course this is the Ford Easy Fill system with no fuel cap. The owner had to replace the purge valve and the canister to correct the issue. When you have a problem like this you can have a long list of other symptoms. One of the most common is after filling the tank you'll actually suck raw gas in through the vacuum supply connection on the intake manifold.
This can make the vehicle sputter and misfire and set various check engine light codes. However, trouble codes for a rich mixture or random misfire are the most common. Often when the purge valve malfunctions it will set a code P1450, but this is not always the case. If your vehicle is making this odd noise from the Ford Easy Fill fueling valve you might have a purge valve problem. The good news is the purge valve is not difficult to replace and the updated parts seem to be more reliable. You can do a search for "Ford code P1450" to view step-by-step replacement videos.
My wife has a 2014 Ford Fusion......just changed the engine compartment purge valve as they say there are 2 in the system...the dealer said it was the front, so I changed it today. Every time we fill the car with gas it wont start unless you pump the gas pedal while it cranks.......we do have that burping/farting noise on occasion and the car has lost power up to the point that my wife has to pull off the road......so hopefully this fixes that? time will tell. The car also has a parasitic draw that causes the battery to die overnight and the interior fuse block is way up in the top left corner of under the drivers side dash where I can't even get to it and check the fuse block for it...... I used to work at a Ford/Lincoln/Mercury Dealership, and now remember why I left it to work at GM dealers...it is unfortunate because the Fusion is an impressive car for a Ford. lol And almost forgot to mention once the transmission is "hot" and you put in reverse...it wont engage without applying gas and then it SLAMS into reverse. Other than these problems it is a nice car I wish we could get rid of.
So the purge valve is usually located in the engine compartment which is probably the one you changed. the other one is called the vent valve and that is located next to the cannister at the rear of the vehicle.
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