99+ Miata/MX5 4and3 Crank/Cam Combo Decoder

[Fred]

Abe, she's all yours, take it away! :-)

Fred.

[Fred]

Don't tell me that I'm going to have the NA pattern done before you have this done??? :-p

Fred.

[Fred]

Note, when it says falling, it means at the sensor, these cars have a VR conditioner built into the sensor body, and output a conditioned pulse of unreliable width with an active low that starts on the zero crossing of each tooth and ends wherever depending upon RPM.

And here is the the data for the M2 (NB) Miata, 1999-2005.

The numbers are crank degrees relative to the #1 TDCC (negative being before and positive after)

Crank signal edges in one engine cycle ( engine cycle = 720 crank degrees), 16 edges total:

falling edge at -80 ( == 640 )
falling edge at -10 ( == 710)
falling edge at 100
falling edge at 170
falling edge at 280
falling edge at 350
falling edge at 460
falling edge at 530

Cam sync signal edges in one engine cycle, 6 edges total:

falling edge at 37
falling edge at 377
falling edge at 421

From an old post in this section, dug out by Abe!

It needs twisting somewhat to generate a usable FreeEMS angle set.

Maybe later.

EDIT: Five years later:

[Fred]

Formal issue for creation of this decoder:

http://issues.freeems.org/view.php?id=114

Abe, you might wanna monitor this thread and issue! :-p