I'm trying to remember a movie (possibly a TV show, but more likely a movie), I think from around the 80's, which featured a De Lorean. It's not one of the Back to the Future movies, nor does it make any reference to them. It is fiction, so not one of the several documentaries about John De Lorean or the car itself. The car is definitely featured in the movie, not just sitting in the background (e.g. the one in Scarface). The De Lorean is definitely the "hero car" in this movie, the main characters drive it, it is involved in a chase if I recall. The movie holds something of a cult-classic status, though it's obviously less well-known than BTTF. I feel like there was a sci-fi element to the movie, though it was set in present day for when it was released.
Possibly the car driven by the character "Centauri" from the movie "The Last Starfighter"
Its hard to be sure if it IS a DeLorean, but it looks like it could be a heavily modified one.
It is involved in at least one chase scene.
The movie is a Cult classic.
But the car plays only a minor role in the movie. Usually shown when "Centauri" is on screen.