Hi, i am new to this site, i have a 94 toyota pickup that jsut broke down i was wondeirng if you guys could help me out.While i was driving up a hill, my engine just shut off. after getting it home, i checked through everything this is what i got. fuel pump wont work unless directly hooked up to battery, when i run it drirectly to battery it does pump gass all the way pass the fuel filter. all fuses in cab are good. what i found that was bad is the EFI fuse thats in the engine bay. this i switched out, tried starting it up, imediatly it poped. i checked all injectors and the wires are all fine. what else could cause this? Thank you for looking and the help.

 

could be the o2 sensor wires shorting out on the exhaust.

 

wow thank you, that was it! thats redicules. a lot of trouble for that. thanks again.

 

np, its a pretty common problem.

 

any chance you could give me a little more ifo on what you did to solve the problem? i unplugged my O2 sensor but i am still not getting power to my fuel pump. I can ump it so I know it works. sounds like you had the same problem. Thanks

 

my diagnoses port wires chaffed and it caused my efi fuse to blow

 

Generally not the plug at the O2 sensor that is the issue, it is the length of wiring from that plug back to the ECU that gets shorted some place. Common cause is those wires falling against the hot exhaust melting the insulation and causing the short.