Hey Brian,,,, I was lookin at some Fiero wiring diagrams, Man some of em used a 2 speed cooling fan motor that used a processor to control the fan relay, but the 2 speed motors only used a 20 amp fuse and the single speed motors only need a 10 amp fuse, wonder if ya got a 2 speed motor and its hittin both speeds on start up ????? I checked with NAPA and ya can buy a brand new "value line" fan motor for about $36 bucks in the states...
Only other thig I can think of is hard as them fans worked on a Fiero your salvage motor may be flat worn out......