Since it is an old thread, I'm throwing a hail Mary here.
I've having a similar problem, when I shoot the gasoline trail, the cutscene starts but freezes after about half a second, then my game crashes.
I've actually had the exact same problem about 1 year ago, but then uninstalled the the game (due to buying a new computer). I find it really odd that the game crashes on the same cutscene one year later, and on a new computer!
What mods did you use? I only have vehicle mods and the heap adjuser etc.
Thank you in advance.