Hi all, new to this forum and to subaru but recently purchased a my06 wrx wagon. Been absolutely awesome in the short time owning it. Now today came on to boost in 4th and 5th and it ran really rough and blew a lot of black smoke with a couple of miss fires. Drive off boost and seemed ok. Pulled up at some traffic lights and there was a horrible groaning noise from under the car and my partner said she could feel vibrations under her feet. (I'm guessing fuel lines). Stopped in a car park and still making noise and I could feel the bad vibrations in the fuel lines in the engine bay. Turned car off for 2 min then it wouldn't start. Just wound over. Waited like 10 min then it started and ran fine on the way home. No more noise and running fine. No codes or CEL.
So I'm sort of stumped on where to start with this. Fuel pump is only 8000ks old any help from you guys would be great. Done a lot of research but nothing sort of matches.
Car is stock with gfb BOV and 3 inch TBE

You have blown a hose fitting off

Check the intercooler hoses . Have a close look

Checked for leaks, vac is 19-20 inHG at idle. And is running like there is nothing wrong with it now

Very strange