Sounds like the pump is not working. I would normally tell you to just test the fuel pressure but since you have the pump out of it, I would just replace it. The smoke or vapor coming from the pump is not normal so it sounds like the pump is burned up. They may have been water or moisture in the tank and it burned it up once you got it running again.
Here are some guides that may help with this:
Below are the instructions from the manual that will help with replacing this for you if you need it.
Clearly we will not know if this was the only issue with the vehicle until we get it back in and test the system.
Images (Click to enlarge)
Monday, May 17th, 2021 AT 7:19 PM