[Subanez]

I'm not entirely sure how Porsche engines work, but usually the fuel running through the pumps acts as a lubricant...and I do know that bad things can happen to an engine if you run out of fuel. (I ran out of furl with my old 1989 VX Fox...had to replace the fuel pump and fuel transfer pump!!!)

Maybe some guru on here like Tool Pants or mrmickeymouse has better advice, but I would take it pretty seriously, especially if bad smells came out.

Good luck!