Right then gents,

Have read up on this and found a thread on how to do it, we followed what i thought was being said but we seem to be having issues?

How we have done it,

Std loom is sitting under the inlet manifold as normal, coil packs have been removed and we have a 98 coil sitting on the inlet manifold, we have a HT lead going to each spark plug from the coil.
Now, on the 98 coil there are 3 wires, a red with stripe, a yellow and a blue.
On the loom there are 2 wires for the coil packs and they are yellow and red with stripe.
We connected the 4 (from the coil pack wires on the loom) red with stripe wires to the red with stripe on the 98 coil (makes sense?)
The other wires are all yellow on the std loom and are we guess the trigger wires, so we have connected cylinders 1+3 to the yellow wire on the 98 coil and 2+4 to the blue wire on the 98 coil. we have siamesed 1+3 and 2+4 together
It will start but only run on 2 cylinders? and it only seems to run on cyl 1+2? Cyl's 3+4 are sparking but at the wrong time, we think they are sparking at the same time as 1+2 and thus not igniting the mixture in the cylinder.
We've swapped the wires around so that all trigger wires have seen each other but we cant seem to get it to run on all 4 cylinders, it will only run on 1+2?

Any ideas please gents

 

anyone?

 

I have been studying the wiring diags & you have made an incorrect assumption.

The yellow wires on both the 4 coil & single coil set ups are a 12v feed that is shared by the engine ecu and fuel pump.

The red/stripe wires are the trigger wires.

Phil

 

that might help, however we have changed the wiring, it is now siamesed on 2+4 and 1+3 it runs, but not very well, it feels like its running on 3 and is over fueling?

on the 98 coil there is 3 wires, yellow, blue and red stripe, what will the blue wire be?

 

Its my car we have been working on! You are correct in what you are saying however when the individual coil packs are plugged into the loom the yellow of the loom mates to a red on the coil pack! So the yellow on the coil tail then becomes the trigger and the red the 12v feed!

 

Ok guys here goes.

Single Coil 3 Wire Set up:

Pin 1 = Blue Wire - This is a trigger wire from the Ignitor/Amplifyer

Pin 2 = Yellow Wire - This Wire receives an Ign switched 12v feed from fuse No: 16 which also supplies the low tension side of the fuel pump relay.

Pin 3 = Red/Green Stripe - This is a trigger wire from the Ignitor/Amplifyer



On Plug Coil Set Up:

Yellow wires x4 = This Wire receives an ign switched 12v feed from fuse No:16 which also supplies the low tension side of the fuel pump relay, the ECU & the main relay.

Red/Green Stripe = Cyl 1 Trigger wire from Ignitor/Amplifyer

White/Red Stripe = Cyl 2 Trigger wire from Ignitor/Amplifyer

Blue = Cyl 3 Trigger wire from Ignitor/Amplifyer

Light Green = Cyl 4 Trigger wire from Ignitor/Amplifyer

Hope this helps!

You may find, by joining trigger wires together that you are confusing the Ignitor by sending a signal the wrong way up the un-triggered wire. Fitting a diode to each signal wire should stop this.

I'm intrigued as to why you are coming away from a well proven 4 coil system & trying to fit an inferior single coil setup?

Subaru ran the 4 coil system for 6yrs before trying the single coil, but soon changed their minds and went back to the old system.

Phil

 

the coil on plug do break down fairly rapid wen running big power..
I did this switch to a 98 coilpack when I was trying to run 1.8bar on a gt30r..

done around 100k on it since without issue.. coilpacks won't last that long and cost a lot more.

hate to say it but you must have a wire(s) wrong?? dry joint on a trigger?

Simon

 

Looking into it Simon! Thanks for the breakdown Barrets!