Blowing EFI fuse everytime I turn my car on!!!!!!!!

[suprahero]

As most of you know, I' electronically challenged. Here is what has happened.

I removed my stock fuel lines, replaced them with a -8 supply line splitting into two -6 for the fuel rail. I also replaced my 624 injectors with some 850 top feeds. After putting everything back together, I cranked the car up. It ran for about five or six seconds and then blew the EFI fuse. Replaced it, turned the key on, zap......blew it too.

So far I've replaced the fuel pump relay with another one, turn the key on, zap. I dropped the tank again to make sure I didn't have any wires bare or touching, nothing, everything looks perfect.
I checked all the wiring to the new clips on the injectors and everything looks great with them. I soldered and shrink wrapped every one of them. That's all the wiring I did. The car was running perfectly before I did these changes, but now it's blowing fuses in a matter of milliseconds.

The old injectors read 15.8 ohms resistance. These newer ones read 7.1....... I cant' change the setting on my stinger because the key has to be on to read from the stinger and everytime I turn the key on, I blow a fuse. I even put in a thirty amp and it didn't fare any better than the other ones.

I need this fixed today if possible because I have a charity event saturday that I was wanting to turn the boost up for. Any suggestions will be tried and appreciated. Thanks, Jay

 

[Freshmaker]

Did the injectors need to be wired in? maybe you have a short in that circuit?

 

[89nasupra]

Recheck all the wiring you touched. Chances are something it touching somewhere or has come out of it's connector causing the short. Had the same problem afterI rewired my fuel pump circuit and a wire had come out the butt connector. Good luck.

 

[suprahero]

Thanks guys. I've got a few things I'm going to check before I remove the intake again. It's a pain in the ass to take off, but I may end up having to do it.

 

[tissimo]

Did you redo any of the fuel pumps?

 

[suprahero]

Did you redo any of the fuel pumps?

No I didn't Justin. I already had two walbro's in the tank so I felt like that was enough for the goals I'm shooting for.

Removed the clips. Turned it on and it didn't blow. Changed the injector impedance. Hooked the clips back up, turned it on and it cranked. Ran for a few seconds, quit, I started it back up, ran for two seconds and zap....blew the fuse again. I then tried to install a 25 amp in there with the key still on and it zapped it immediately.

I'm trying to find any bare wires or anything that could be causing this, but I've been looking all night and all morning with no luck. I'd be glad to try any more suggestions if you guys have any. Thanks.

 

[JPsToyota]

Im not super familliar with the fuel circuit, but is plugging the injectors in one-by-one an option? That way you can see if it's a certain injector/wiring or if you should be looking somewhere else, maybe before the injectors in the power wire. Sounds like a short to ground so far.

Strange how it seems to only blow now when the fuel injectors are active, possibility of a faulty injector?

Get some more fuses for testing

 

[suprahero]

I got it all figured out so thanks for the suggestions. It was a wire that goes into the firewall from when I did my 1jz swap. When I took the intake off, I must have pulled it causing it to get skinned back a bit. Everything seems to be working as it should now.

I'm off to the dyno tomorrow to hopefully turn the boost up and make somewhere around seven hundred horsepower.

 

[JPsToyota]

Had the same problem causing my AM2 fuse to blow, glad you got it figured out. I made a little wrap out of a bicycle tube foam cover thing around my harness in that area, just in case.

 

[isnms]

How did you do?

 

[kamikazemkiii]

Wow this seems very familiar to what ive been experiencing. Glad to see you figured it out. Hopefully i will too soon.

 

[suprahero]

How did you do?

The car did fine, although it now may be hurt. It's smoking a good bit at idle and cruising, but not under boost.

It made 640rwhp and 609rwtq on the last pull. Earlier it had made 633rwhp and 636rwtq which I thought was very cool to make that much torque. I was maxxing something out though becasue it made the same horsepower @ 26 psi and 28.5 psi. It didn't change not one bit. It showed more boost but didnt' make any more power. I dont' know what is going on with it. Maybe my turbo is giving out. It's a pt67 dbb that's about two years old now with lots and lots of dyno pulls.

 

[isnms]

Hope it's nothing to serious.

I'm going to dyno mine tomorrow... I'm hoping for half what you made