COP'S

Coil-Over-Plugs

Since i now have a aftermarket ecu in and working, i can go down the wrote of wasted spark.
Which uses 1zz,2zz,2az,etc coils. These sit directly above the spark plugs require a 2 channel ignition drive from the ecu.
As the LinkPlus has up to 8 ignition drives this is easy as.
So I scored some from the wreckers with some wiring and plugs to suit.
I ended up wiring the second ignition drive to the IGF pin in the standard loom, as this goes to where the igniter is so makes it easy to wire in.

First test run.
Wired all Earth wires together
Wired all 12v wires together
And wired 1/4 together and 2/3 together and these go to IGT and IGF which are the 2 ignition drives.

In addition to all that i also tidied up the wiring around the ECU and mounted it under the dash.



Now becuase of the coil packs the Tacho doesnt work. THis is becuase it uses a high level input from the coil negative. The coil packs dont have this because of the inbuilt igniter. SO the only way to get a tacho is from the ECU.
But this signal is a Low Level output, so doesnt work with the standard tacho.

BUT...

There is a way to change it to a low level accepting tacho, to do this i followed what this guy here did and replaced a Resistor on the circuit in the Tacho.!
I used an old Standard Ecu which i removed the plug from to find a suitable resistor.!