Hi,
Black smoke indicates a rich fuel mixture. So, it is possible that the pressure regulator is bad.
I hope you are sitting down. I just ran through the procedure for replacing one (which is attached below), and the intake needs to be removed.
As a result, I would check fuel pressure first to confirm that it is the issue. Here is a link that explains in general how it's done:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Also, pic 2 shows the pressure specs, and pics 3 and 4 are the directions specific to this vehicle.
Let me know if this helps, and by no means am I tired of hearing from you. I'm a little jealous you are warm, but what can I say. lol 60 here today, rain, tonight, rain to sleet, then to snow. Temperature to drop to 20 degrees. Ugh!
Take care of yourself,
Joe
See pics below.
Images (Click to make bigger)
Thursday, February 17th, 2022 AT 4:06 PM