"faint spark" is a correct and usable phrase in written English.
You can use it to refer to an object, person, behavior, or idea that hasn't been completely extinguished or forgotten, but still remains. For example, "Despite the many challenges he faced, he never gave up hope. There was a faint spark left in him that still burned brightly."
Last month, scientists at the University of Illinois at Urbana-Champaign reported in The Journal of the American Chemical Society that those faint sparks were energetic enough to power chemical reactions along the fracturing surfaces.
The scene at the armory under a scorching sun was solemn, melancholy and resigned, with only faint sparks of the kind of restorative energy that will be needed to rebuild the city of Los Alamos, 30 miles to the north.
She knows he employs it to keep the world at bay, and as he becomes more obsessed with the lens and more removed from life, we can see the energy slowly being drained from her; there's still a faint, feisty spark in her eyes, but it's dying.
In possibly the biggest advance in the science of candy since the discovery that Wint-O-Green Life Savers emit faint blue sparks when chewed, scientists are reporting today that M&M's pack more tightly in your mouth than gumballs.
To do the job, you need stamina – lockdown started three hours before the awards – a working knowledge of current celebrities, and the ability to come up with a question that will spark the faintest bit of interest from nominees who have spent months answering other dumb questions.
Telescopes can spot these events when the gamma rays plow into Earth's atmosphere, sparking cascades of millions of particles that emit faint meteorlike trails of bluish light called Cerenkov radiation.
However, he suspects other L dwarfs may be bona fide stars, albeit faint ones, if they are massive enough to spark hydrogen fusion at their centers.
Making H.C.C.I. compatible with a broad range of fuels; reducing the faint rattling noise during the transition from compression ignition to spark ignition; and reducing emissions at low loads are other issues being addressed.
Though she doesn't intend to damn The Art of Fielding with faint praise it is the admirable quality of hardback's "quality paper" and "elegant font" which seems to spark swithering's enthusiasm, and not Harbach's "plodding" novel.
