unfortunately electrical fires don't really look like that
you get a brief puff of smoke, an acrid stench and then thick clouds of noxious vapour. Your car must be an utter shitheap to start with if it manages to burn through to the fuel hose or into the cab.
( Grrrmachine the indifference engine, Tue 12 May 2009, 17:03, archived)

That's why I'm sure it would go up like a rocket

(Bazongaloid, Tue 12 May 2009, 17:05, archived)