Bad fuel sending unit blowing efi fuse?
#1
Bad fuel sending unit blowing efi fuse?
Working on a 90 runner 3vz. Blew the efi fuse, so I checked the 02,maf,ecm, and they are all good.
When this first happened I was driving when the low fuel light came on, but the tank was full. Not long after that the fuse blew and after that the guage reads properly with just the key on , but when I start the rig it grounds out and goes to E.
I haven't pulled the tank yet, but I was wondering if there was any relation between the sending unit and the efi fuse, cause I would not think so?
When this first happened I was driving when the low fuel light came on, but the tank was full. Not long after that the fuse blew and after that the guage reads properly with just the key on , but when I start the rig it grounds out and goes to E.
I haven't pulled the tank yet, but I was wondering if there was any relation between the sending unit and the efi fuse, cause I would not think so?
#2
Off the top of my head, the sending unit doesn't use the EFI fuse.
Double check the wiring diagrams to make sure.
To check for a short you can jump a light bulb instead of your fuse. This will allow the circuit to stay active so you can check it.
Double check the wiring diagrams to make sure.
To check for a short you can jump a light bulb instead of your fuse. This will allow the circuit to stay active so you can check it.
#3
yeah you're right it doesn't, but I was thinking maybe the fuel pump circuit and the sending unit cercuit could be rubbing on each other. Guess I won't know until I pull the tank.
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