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Connected Battery Wrong Way Around

barnoon

By barnoon,
in General Maintenance

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barnoon Experienced

barnoon

Posted
Posted

Hey guys

tonight while re connecting my battery in a moment of sheer idiocy I connected the battery terminals around the wrong way and BOOM huge sparks from the battery, I immediatly realised what I did and checked all fuses in the fuse box under bonnet and all under the dash on the drivers side, they were all fine, now when I try start the car it just cranks and nothing else, the hand controller on the Power FC doesnt light up or anything

Did I fry the PFC or is their something else I should look into ?

Cheers guys really need help on this

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barnoon Experienced

barnoon

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Ive checked the fuses 3 times now, chucked the stock ECU in then and still same thing car cranks but wont start, but I have Z32 AFM, GTR Injectors and Resistor pack etc so the car wouldnt start with the stock ECU anyway would it?

msnismo Grand Master

msnismo

Posted
Posted

Do you have injector pulse? No injector pulse is a sign of a blown ecu... car will crank as per normal but wont fire.

Edit - check with both ecus re injector pulse..... could be some wiring has melted also.... I had wires melt behind the wastegate (Map sensor wires) end result was a blown ecu... wiring replaced and a new ecu it was all good.

d00dz Grand Master

d00dz

Posted
Posted

Check all fuses in engine bay, drivers side panel and in boot.

I know the feeling when silly mistakes brake the car and always think the worst has happened.

Eliminate the small things before thinking it's the pfc/injectors/ other things.

Good luck!

msnismo Grand Master

msnismo

Posted
Posted
Nah car didnt start at all or go to start at all just cranked,

I have no idea if I have injector pulse how do I check that? thanks

The way I know is these little globe things.... forget the technical name! lol

Basically you remove the harness from the injector and plug it in to the globe and crank he engine over. If they are working it will light up.... my dad has a set of them, il find out the right name tomoz!

Could be another way.... possibly someone else knows????

BH_SLO32 Proficient

BH_SLO32

Posted
Posted

Ok, lets start eliminating a few things. Firstly, lets check to see if you have power to the computer, ECCS relay, fuel injectors and ignition coil relay. These power supplies can be checked easily by simply using a multimeter and probing the wires at the connector near the power steering reservoir. The big white wire with black stripe feeds battery voltage directly to the injectors and pin 58 on the ECU and also feeds power to the ECCS relay. Note that with the battery connected you should constantly have 12V at this wire.

Assuming this is ok you'll need to check the big white wire with purple stripe for battery voltage as well. This is a feed to the ignition coil relay. Check this first and then advise findings. These items will at least tell us whether some of the main power feeds are present.

Let us know how you go and we can then determine the next step.

With all this, I am assuming you have no fuel pump operation. If the fuel pump is working it would imply the ECU is probably getting at least power to pin 58.

Cheer,

Ben

Nah mate could never hear it turn on before it stuffed up. I really hope the PFC isnt fried because its next to impossible to source one for a RB20 now and I dont have that kind of money :thumbsup:
Psymon Mentor

Psymon

Posted
Posted
The way I know is these little globe things.... forget the technical name! lol

Basically you remove the harness from the injector and plug it in to the globe and crank he engine over. If they are working it will light up.... my dad has a set of them, il find out the right name tomoz!

Could be another way.... possibly someone else knows????

Noid lights i think they're called. :thumbsup:

FATAZZ Grand Master

FATAZZ

Posted
Posted (edited)

dont feel bad,i did the same thing.LoL

now im no electrician,i should be able to confirm when i get home by looking at my old burnt out fuse.

Now in the fuse box in the engine bay drivers side,theres a green fuse that needs to be changed,i can maybe even give you the narva part number. BUT my electrician who sourced it said i was lucky that my mate wired my turbo timer in dodgey which luckily saved my ecu.

Soon as i get home,ill get you the electricians phone number if you like,he comes to you from Penrith.

Edited by RSTME

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