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-   -   Injector output question LT10-s (https://www.rx7club.com/microtech-111/injector-output-question-lt10-s-1138083/)

Tommy Chung Aug 8, 2019 04:19 PM

Ignition output question LT10-s - what computer do I have??
 
For clarity the heading should be easier

“Ignition output problem LT10s”

Ok you will have to bear with me on this one.. hope it makes sense how I explain this
Pics for reference below

The details :

-Microtech LT-10s v1.0
-ECU page notes Maz b2.0, it has all the usual 13bt settings in comp like ignition split and is currently running sequential ignition setting
-came with a loom but no x4 box but has plug outs for one
-On the 24 pin out from the computer there is 2 x vacant pins that should be IGN output #1 & 2
-Pin out for IGN #3 has grey/red
- Pin out for IGN #4 has grey black

I’m stumped how this computer has run before?
Has it just ran on trailing plugs? as it appears to me like it’s only got wires for T1&T2 if you read most micro manuals for LT it LTS. Did micro do an LT10s without a x4 box?

Now the kicker .. when put into test mode:

IGN #1 output reads 0.81v (vacant no wire from plug)
IGN #2 output reads 0v (vacant no wire from plug)
IGN #3 output reads 0.81v
IGN #4 output reads 5.85v... (this seems wrong?)
Ive bench tested this several times
Micro gurus... what’s going on here? Any and all help appreciated
https://cimg1.ibsrv.net/gimg/www.rx7...5ffa6db29.jpeg
https://cimg3.ibsrv.net/gimg/www.rx7...1fefcfe07.jpeg
https://cimg4.ibsrv.net/gimg/www.rx7...b151819b7.jpeg
https://cimg7.ibsrv.net/gimg/www.rx7...1b4ab65164.png

NismoDome Nov 11, 2019 01:03 PM

from the looks of your pictures, you have a LTX style ecu.
was meant to be used with a X4 box (external igniter) giving it the capability to run in direct fire.


there was an option of the LTS that did not use a X4 box and required use of the OEM igniter.
this setup was only able to run wasted spark. (both leading coils fire at the same time)


since you dont have a X4 box, you still have another option you can do, like how my setup is currently running
i have AEM Smart coils (built in igniters) with the X4 box deleted, and made a harness to split power, the Ecu sends out ground signals to fire.

or, you can purchase a X4 box with harness, de pin your current T1 and T2 cables off the ecu plug and the new X4 loom will come with wires to pin into that position.
then you will end up with a flying lead out from the X4 box you will then have to terminate and set up power going to the coils.

it all depends on what your current ignition coil setup is like on the car.
do you still have the 3 oem coils?
do you have 4 T coils to be able to run direct fire, or aftermarket coils that have built in igniters, or even dumb coils to be fired off the X4 box.


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