possibly the flex pipe just  down from the cats, mine leaks under hard accel. then stops and goes away. 

Apparently my family are aggressive cup holder users. The epoxy and other adhesives didn't work out, shocker, I know.   I was going to get the POM plastic pop rivets and tool, but I figured I would try a 1/8 aluminum with a backing on both sides. I think this is the winner. I have a plastic welding kit I will do the 2 that don't have an open backside, but I won't be doing it again, I will order another cup holder.   The gore: I found a decent length one, I have quite a few mismatched collections of rivets. I would have liked a little longer body, but these snapped the mandrel before enough pressure to break the plastic, and with the backers, shouldn't pull through.

I did all sorts of bench tests on  the Dorman and based on those tests I assumed it must work, but after a good web search found that for reasons unknown the 3rd party evap valves don't work - installing a Motocraft confirmed the search results.

It is called "Radial Tire Pull". Just as @RPGR90s stated. If it still exists look up Firestone 500 problems. Those were replaced with almost as bad Firestone 721. Luckily, we don't see as much as in the early days switch to radials. Also fewer flats! And never forget the TPC radial problems good old GM.  

Thanks for the reply. I pulled off the Dorman unit and tested it with a 12v battery and it appears to open correctly as well as hold suction.    As far as the under vehicle cannister, the only thing I found was forward of the muffler that has some hoses going to it and an electrical connector. It mounts right up against the floorpan just forward of the muffler. 

Good day and thank you for the add. Not sure where to post this so I'm going to put it here for now. Has anyone else try to change the fuel low pressure sensor on a 2.0 ecoboost Ford Edge and it's not where it's supposed to be? I've read it's supposed to be on the line along the firewall but trying to find mine it's not there. Anyone have insight into this? Thank you in advance

@RPGR90s I have used the Dorman evap purge valve and it did not work, or didn't work for long.   I don't know what it is and why the third party valves don't work but can confirm that the Motocraft replacements do work.   The current one I bought from this eBay seller and its been working for one year. Genuine Ford Vapor Canister Purge Solenoid GL3Z-9B325-B | eBay   Get the free Forscan Lite to use with an OBDII adapter to read and reset codes.   You'll find the PDF's in this thread showing the location of the canister - it's not easy to access.    

It's really not that hard to find    

Cant explain what you encountered but would recommend alignment soon after the new tires are installed.

2019 Edge ST with 105k miles   Recently the check engine light came on and my scanner revealed the two error codes.    Since the purge valve solenoid is right on top of the engine, I thought I would replace this first. Dorman 994-073 Vapor Canister Purge Valve   I tried clearing the codes but my cheap scanner won't allow me to do that, so I was hoping the codes would clear themselves, assuming the purge valve is now working.    I have also cleaned and inspected the fuel filler area, but it appeared very clean and tight.    I would also like to inspect/replace the charcoal canister but I cannot find it's location. If anyone could tell me, I would be most appreciative.    Thank You!!   RPGR90s