Blew efi fuse what would cause this?

[Tysree]

Drove it around to see if the missing/crappy running a 0 vac would go away but it didn't then blew efi fuse. What would make that blow?

 

[Dan_Gyoba]

The vast majority of blown fuses are caused by a short to ground. Since there are many places that the EFI system sends out voltage to, there are many places that it could short to blow a fuse.

 

[hvyman]

If your turbo make sure the o2 sensor wires are not burning on the turbo.