R33 Gtst Blowing Fuse

[rofster61]

Need help asap

R33 skyline keeps blowing engine control fuse

Any help will be much appreciated

[Hadouken]

if you want anyone to put effort in then maybe you should consider putting some effort in.

How about we start with your car.

What 33 is it?

What has been done to it?

What have you touched recently?

When does it blow?

What else is happening?

See where I am getting at......

[rofster61]

Ok

R33 s2 gtst

Mods turbo back exhaust

Fmic

Hi flowed turbo running 14psi

550cc injectors and nistune z32 computer.

Nothing has been done to the car for the last 6 months drove fine still went hard. This morning started the car this morning and let it warm up then started to drive to work got less then 1km away for home and it just stopped. Checked the fuses and found one to be blowen replace it and now when i turn the ignition on it blows straight away.

[Hadouken]

Was it raining heavy? Have you looked in the engine bay for any scorched wires?

[rofster61]

It was wet but not raining still going through all the wires in the engine bay

[rofster61]

All the wires in the engine bay look fine

[Hadouken]

Have you put a multimeter across the 2 wires? Time to whip out the wiring diagram...

[Hadouken]

Have you checked your ecu? Does it smell? Is it wet?

[rofster61]

Have pulled ecu out, doesn't smell burnt pulled, cover off and looks ok on inside and is dry. Have swapped ecu to std unit to check but still blew the when ignition turned on. Have bypassed fuel pump relay to test pump and pumps works fine. Checked fuse block with multimeter found that the fuse is shorted to earth (where earthed is don't know). Been looking for wiring diagrams to help but have found anything yet.

[89CAL]

Is it fuse 8 (10A)?

If so it powers and signals the ECCS relay then feeds power directly to the ECU as well as the AFM and CAS by the looks of it. Try unplugging the ECCS relay for a start (because a power feed for the ECU tees off between the relay and the fuse) then unplug AFM and CAS and see what happens. Then plug them in one at a time and see if one blows the fuse. Other then that it will be a wire shorted to ground or faulty ECU (which you have already tried to eliminate anyway)

[rofster61]

All fixed turned out to be the o2 sensor wire was touching the body thanks for your help