92Yotaa

i just did a motor swap on my 92 yota pickup 22re and ive been driving it.. its been doing fine till just a little bit ago i blew a fuse and the motor just died while i was drivin down the road all the lights were still on and it would still turn over i changed the fuse out it started and i was driving home it was missing out after about two more mile it blew the 30 amp fuseable link. it did this before with the old motor and it was my oxygen sensor wires were melted together on my exuast but i dont even have the oxygen sensor hooked up yet i have all the wire tied up to the frame away from the exaust they didnt look burnt again but it was dark any ideas?