I have a 1990 4runner 3.0L that just started popping the EFI fuse out of no where. Has anyone had this issue before and where should I start with the troubleshooting? Any help is appreciated.

 

Common cause is an O2 sensor wire that is loose and falls against the hot exhaust, melting the insulation and causing a short. Good place to check, follow the wires from the O2 sensor(s) from where they plug into the exhaust back to the wiring harness.

 

Thanks 4crawler, gettin under it now

 

Hey 4crawler you hit the head on the nail with that one, that had to be one of the fastest electrical troubleshooting fixes for me yet, Thanks again..!

 

this should almost be a sticky lol.