1NZ/1ZZ coils and 20V motors/igniter/coils

[Skylar]

So, simplifying stuff,

20v ignitor + coil works.
20v ignitor, no coil doesn't work.

This suggests to me that the ECU wants to see an IGF signal from the ignitor. In which case, you build an IGF faker(circuit diag. on toymods) and plumb that in between IGT and IGF, no? This way ECU thinks spark went happily on it's way to the distributor and will allow the engine to rev onwards to redline. or even wire ONE of the COP's IGF to the ECU IGF. and you can remove the stock ignitor completely and you can get the tach working another way, through a tacho booster.

To answer your question regarding the b/br wire. Pretty sure you can't use this. I watched the signal on my oscilloscope and looks nothing like a square wave. Not that I've thought about this but I think the trigger is the wrong way for you to be able to wire it to any of the coils. and the voltage should be 12v not 5v that the 1zz coils are expecting.

[munki]

if the signal is not a square wave then it is not designed to be read by an ecu and is more likely what i said the low tension side of the coil showing a voltage 'spike' If you could swing me a diagram of the blacktop loom we should be able to get the issue sorted, as there is a little bit of confusion between the actual wiring.

[Skylar]

I should clarify myself a bit. What I was watching on the o-scope was the negative side of a coil, the low tension side of a nissan coil, not a 20v. But by no means did it look like a 'spike'. You could do some processing and get it to a signal the COP coils could use but then you lose the whole collapsing field effect that generates the IGf signal and you might as well not have a coil connected at all.

[Hen may possibly be a nut]

Could the issues be caused by the ECU missing IGf?

There's a bunch of chat about manufacturing an IGf signal to keep a stock ECU happy . Errm, just saw with a re-read that Skylar had already made this suggestion... so I agree with him.

And if the lack of tacho is the main problem then you can make a voltage spike for the standard AE86 tacho from IGt.

[70XIN]

Cheers guys, all sorted

[Hen may possibly be a nut]

... and the solution was?

[akim.is110]

do you have any diagram for mtx8 microtech for 4age 20v?


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[ae86 drifter]

hey mate what are u chasing? I've set mine up on these coils..