Microtech Wiring Question

[copycutter]

Hi everyone.

I'm in the process of wiring up an rb25det, so i've just bought a Microtech LT-12s direct from their website. I also have a new Series II wiring loom ready for the plugs (motor is Series II also, just had previous wiring loom and PFC stolen).

Now that i'm up to beginning wiring the engine, we've run across a problem; the standard coils that I still have use 3 wires to run them; +ve, -ve and Signal I believe. The LT-12s wiring loom only seems to have the signal wire.

I looked on their website and they also sell something called an "X6 Box", which apparently is for 6 coil engines without built in igniters. Since I have a series 2 motor + coils, wouldn't that mean that my coils have the igniter built in?

If this is the case, how do I wire up the stock coils with this ECU?

Also, for aftermarket alternatives, what are the rough prices i'd be looking at to make it easier. I'd consider aftermarket ones if it's way easier, but I'd rather not have to.

Edit: Also tried searching, but couldn't find anything specific to my issue.

Edited January 23, 2008 by tuna_144

[adam87]

Hi everyone.

I'm in the process of wiring up an rb25det, so i've just bought a Microtech LT-12s direct from their website. I also have a new Series II wiring loom ready for the plugs (motor is Series II also, just had previous wiring loom and PFC stolen).

Now that i'm up to beginning wiring the engine, we've run across a problem; the standard coils that I still have use 3 wires to run them; +ve, -ve and Signal I believe. The LT-12s wiring loom only seems to have the signal wire.

I looked on their website and they also sell something called an "X6 Box", which apparently is for 6 coil engines without built in igniters. Since I have a series 2 motor + coils, wouldn't that mean that my coils have the igniter built in?

If this is the case, how do I wire up the stock coils with this ECU?

Also, for aftermarket alternatives, what are the rough prices i'd be looking at to make it easier. I'd consider aftermarket ones if it's way easier, but I'd rather not have to.

Edit: Also tried searching, but couldn't find anything specific to my issue.

i dont know the answer to your coils wiring issue but i have just bought the same as you but i bought the plug and play adaptor aswell(although still waiting for it to arrive). thats an option that would save having to worry about wiring.

i have a question also. did you get a list of what sensors are needed to run the microtech?

like do you need the air reg or the AAC valve etc. iv asked microtech and they didnt seem to know about the air reg

thanks

[-==L=a=N=c=E==-]

Get a copy of the microtech wiring guide its fairly self explanatory.

For the coils

+VE goes to 12V

-VE goes to microtech (negative switched)

E can be left disconnected or grounded near the coil.

You don't need the X6 box if your coils have the ignitors build in already. If you optioned your microtech to use external ignitors, then you'll need the X6 box, and some after market non-igniter coils (Bosch HEC716 are the favorites here)

[copycutter]

i dont know the answer to your coils wiring issue but i have just bought the same as you but i bought the plug and play adaptor aswell(although still waiting for it to arrive). thats an option that would save having to worry about wiring.

i have a question also. did you get a list of what sensors are needed to run the microtech?

like do you need the air reg or the AAC valve etc. iv asked microtech and they didnt seem to know about the air reg

thanks

I'm not entirely sure the full set of sensors needed. I've got the wiring diagram book with me that came bundled with the unit and that explains most of it. When they emailed me back for this question they told me to call them on (02) 9808 5233 to further discuss the problem.

I've got my friend doing the wiring as it's beyond me. Only the lack of labelling on the Crank Angle Sensor loom and this coil pack issue have him stumped. I will ask him if all those things are necessary and post up here what he says.

Get a copy of the microtech wiring guide its fairly self explanatory.

For the coils

+VE goes to 12V

-VE goes to microtech (negative switched)

E can be left disconnected or grounded near the coil.

You don't need the X6 box if your coils have the ignitors build in already. If you optioned your microtech to use external ignitors, then you'll need the X6 box, and some after market non-igniter coils (Bosch HEC716 are the favorites here)

Thank you for the helpful reply

I didn't 'option' any extras like external coil packs when I ordered it. I simply said it's for a Series II rb25det from a 97' Skyline. I assume then that it would be set up for a 'factory style' coil setup??

And if the factory coils use 3 wires, how can those same coils run on only 2 with a Microtech? I'm not trying to dispute you, I'm just trying to make sense of leaving the third wire out.

Also, in regards to the +ve wire, does it have to be straight to ignition circuit. I've heard things like have it set on the fuel pump relay circuit. Is there a reason why the coils shouldn't be the equivalent of directly connected to the battery?

Edited January 24, 2008 by tuna_144

[-==L=a=N=c=E==-]

If your using the stock wiring loom (i know i would) then just chop the wires at the ecu side of the loom, and splice in the -ve coil wire to the microtech. the +ve coil will already be wired to a 12V Voltage Source.

The E is just an earth, isn't really required.

If you want more information on this, have a look up at the Bosch coil conversion that some people have done to there skylines, they leave the Earth wire disconnected when using Bosch HEC716 coils, as these only have +ve and -ve connection points.

Or better yet, if you don't want to wire up anything, microtech have plug and play adapters for most of the RB's. Just gotta ask.