I just went through this with my car. Its only a slant, but It had nearly the same symptoms. It would not crank sometimes, it would crank but not fire, or it would try and burn the car down. (hence the title)
New ignition switch behind the lock cylinder in the column, and boom. perfect.
Even if this is not the problem, there are great diagrams, tools, ideas, and solutions by mainly
@Mattax ,
@67Dart273 and others.
Burnt Wire
