absRTP

iTrader: (12)

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Reverant

iTrader: (10)

Throw away the igniter, use the MS1 tacho circuit to drive the tacho in the cluster.

absRTP

iTrader: (12)

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90 Turbo

iTrader: (3)

I am doing the same thing. Please Please post details of how you do the: use the MS1 tacho circuit to drive the tacho in the cluster.

Which color wires would be what at the coils?
Where do I pick up the tach wiring for the dash tach to splice it into the megasquirt?


I am doing the same swap and having been searching to figure this out with no luck. Please help

absRTP

iTrader: (12)

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90 Turbo

iTrader: (3)

Yes please update the thread.
does diypnp have a tach output too?

90 Turbo

iTrader: (3)

Oh and which letter/color wire is the tach wire at the ignititor

absRTP

iTrader: (12)

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90 Turbo

iTrader: (3)

So I run a wire from the yellow/blue and black/white ignitor harness on the 90 miata and I splice them and run them to the tach output on the MS Diypnp.
Then I run the Brown and Yellow to the coil 4&1
and I run brown the 3 & 2
Then reset the dwell for the 04 coils and that should do it?
What is the right dwell for 04 coils?

soviet

iTrader: (10)

take the tach wire from the ignitor, solder it to the wire that controls the nearby purge solenoid. wire tacho output to purge solenoid wire on harness

doneeeeee.

absRTP

iTrader: (12)

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90 Turbo

iTrader: (3)

I am running wire into the cabin anyway for the VVT controler but that is a good idea. besides I have not idea what the purge solinoid is or what wire on the harness corispondes to it.
But I was hoping to use stock wires to get the coils signal to the 04 coils. I figured that would be easy enough since I am still running waste style coils like factory. So just run:
Then I run the Brown and Yellow to the coil 4&1
and I run brown the 3 & 2
What do you think of that idea absRTP?
I also wanted to thank you for posting this stuff. It really has helped me get my head around whats involved and answered questions I could not figure out. THANKS!


What is the right dwell for 04 coils?

redrider706

iTrader: (4)

If you are using an aftermarket ECU you can send the tach signal from the ECU via pin 2I (B/W wire) (pin E at the igniter) and you can wire it to pin D at the igniter to send it to the instrument cluster.

-Raj

90 Turbo

iTrader: (3)

So the DIYPNP puts out a tach signal I wire that to the black and white pin 2i at the harnes or I have to run the output on the ecu to pin d on igniter. Which one?

redrider706

iTrader: (4)

Wire the tach signal from the ECU to pin 2I at the harness and wire the pin E and pin D together at the igniter.

sasu`

But is it possible to use the vvt coils and keep the 1.6 igniter?