Efi relay is blowing/burning up…
1992 3vze 4x4 203k miles
Damn thing just died coming home one day, swapped the efi & starter relay and it wouldn’t crank. (Cranked fine on the starter relay) finally had a chance to revisit it yesterday. I put the starter relay in the efi spot and jumped the starter. It started right up and ran an hour no problem. Got a new relay today and beings as I suspected the efi would burn up I put the new one on the starter, cranks no start-swap the relays starts and runs fine.
The efi relay gets super hot, like so hot it’ll burn you if you touch it for just barely a second.
Pulled the relay and from the looks of it pin 87 is burnt. That’s the pin that feeds the output for the efi (fuel pump + injectors)
Anyone have experience with this or know where to start?

 

I don't have experience with this, but it sounds like you've got a short somewhere downstream of the EFI relay, and it's just pulling a lot of current.

The downstream wires are white-red, if that helps. I'd start by checking the EFI 15A fuse. That relay should be able to handle 15A; if somehow you got a 30A fuse in there that's a problem (you might need to leave that over-sized fuse in there until you find the short.) Next, I'd check the O2 sensor. You can get a rubbed-through wire anywhere, but the O2 sensor is in a hellish environment.

Good luck.