yota alternator fire

[Jeff H]

had my alternator catch on fire last night melted the whole back of the alternator so i changed the alt and the wires, and the car would start up but would die out after about 5 secs, if i tried to start it then hit the gas to rev it up it would die out right away, so then i traced all the wires and looked at the fuse and my fuse was melted so i changed that one out with a spare that i dont know for sure that works but it looked ok, after changing out this fuse the truck will still only run for like 5 secs, it runs perfect for these 5 secs but just dies, i have no idea what to do and im pretty much stupid when it comes to electric stuff on cars, so anyone have any ideas? this is on a 1986 toyota 4runner 22re auto btw

 

[mosh5186]

what fuse did it melt?

 

[Jeff H]

the 80 amp one that the alt runs thru

 

[upnover]

Check your air tube for leaks. If it is sucking the least bit of air, that's what it will do. May have been tweaked while working on the alternator

 

[Jeff H]

ended up that the fire had burnt the wires for the air sensor plug, rewired it and she runs fine now