Is there a sutta which answers where a nirvanaised consciousnesses is after death and comapres it to a fire going out? Is there a sutta which answers where a nirvanaised consciousnesses is after death and comapres it to a fire going out?

I thought there was, but can't find it. Sounds like Vacchagota mashed up with the fire sermon.

I'm asking because I like the image, and it almost appears in some modernist poetry.

Failing a sutta, any zen discourses.

Failing that, anywhere in the canon.

Failing that, any important Buddhist, living or dead.

Failing that an academic.
You're probably thinking of Itivuttaka 44:


  This was said by the Blessed One, said by the Arahant, so I have
  heard: "Monks, there are these two forms of the Unbinding property.
  Which two? The Unbinding property with fuel remaining, &amp; the Unbinding
  property with no fuel remaining.
  
  And what is the Unbinding property with fuel remaining? There is the
  case where a monk is an arahant whose fermentations have ended, who
  has reached fulfillment, finished the task, laid down the burden,
  attained the true goal, ended the fetter of becoming, and is released
  through right gnosis. His five sense faculties still remain and, owing
  to their being intact, he is cognizant of the agreeable &amp; the
  disagreeable, and is sensitive to pleasure &amp; pain. His ending of
  passion, aversion, &amp; delusion is termed the Unbinding property with
  fuel remaining. (Note1)
  
  And what is the Unbinding property with no fuel remaining? There is
  the case where a monk is an arahant whose fermentations have ended,
  who has reached fulfillment, finished the task, laid down the burden,
  attained the true goal, ended the fetter of becoming, and is released
  through right gnosis. For him, all that is sensed, being unrelished,
  will grow cold right here. This is termed the Unbinding property with
  no fuel remaining." (Note2)
  
  Note1 and Note2 (commentary by Thanissaro Bhikkhu):
  With fuel remaining (sa-upadisesa) and with no fuel
  remaining (anupadisesa): The analogy here is to a fire. In the first
  case, the flames are out, but the embers are still glowing. In the
  second, the fire is so thoroughly out that the embers have grown cold.
  The "fuel" here is the five aggregates. While the arahant is still
  alive, he/she still experiences the five aggregates, but they do not
  burn with the fires of passion, aversion, or delusion. When the
  arahant passes away, there is no longer any experience of aggregates
  here or anywhere else.