bringin this thread back but , yea my 89 had the same thing happen. I was just late getting there and lost a bunch of stuff due to fire damage. Mine had a cheap(new) cap,rotor, and wires on it with less the 150 miles on them!!!!

 

I actually just posted about a simliar occurence. I have had the distributor caps and rotors melt to the point the truck won't run, only the first was genuine toyota, so I have seen generic and brand name melt. No clear reason as to the cause.