DIYPNP with 99-00 style Cam/Crank Sensors - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-01-2012, 10:21 PM   #1
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Default DIYPNP with 99-00 style Cam/Crank Sensors

Hey all.

So about to wire up my injectors (batch fire), I am using a DIYPNP on a 1.6L but it's a later model engine that uses the 99-00 style crank and cam position sensors.

The DIYPNP manual for the 99-00 states that injectors 1 & 4 are connected together to INJ1, and injectors 2 & 3 connected together INJ2.
DIYPNP MegaSquirt installation for the Mazda Miata

But other sources say that injectors 1 & 3 goto INJ1 and 2 & 4 goto bank INJ2.
https://www.miataturbo.net/megasquir...42/#post577548
https://www.miataturbo.net/megasquir...42/#post577616

So yeah, I'm not sure how to wire up the injectors with all the contradicting information.

I have my COPs wired as follows:
Spark A = Cylinder No. 1
Spark B = Cylinder No. 3
Spark C = Cylinder No. 4
Spark D = Cylinder No. 2

Cheers!
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Old 09-01-2012, 10:28 PM   #2
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The injectors can be wired either way in batch.
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Old 09-02-2012, 07:42 PM   #3
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Awesome! Thanks mate
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Old 09-02-2012, 08:41 PM   #4
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Just to confirm as well....

Should I wire up my coils like:
Spark A = 1
Spark B = 3
Spark C = 4
Spark D = 2

Or should it be this:
Spark A = 3
Spark B = 4
Spark C = 2
Spark D = 1

OR

Spark A = 4
Spark B = 2
Spark C = 1
Spark D = 3

Last edited by mrpham; 09-02-2012 at 09:48 PM.
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Old 09-02-2012, 09:54 PM   #5
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As with damn near every other inline-4 engine in existence, the Miata's firing order is 1-3-4-2, so your first config is correct.
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Old 09-02-2012, 09:59 PM   #6
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Thanks mate!

Was just curious because on my friends MX-5/Miata with a Adaptronic ECU, his coils were wired up like this:
Spark A = 4
Spark B = 2
Spark C = 1
Spark D = 3

It wouldn't run when wired up 1-3-4-2... weird ey?
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