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For anything related to the 'official' Speeduino boards (Eg v0.3, v0.4 etc)
By tx_haggis
Background: installing a BP4W (VVT) into a 1990 NA Miata

I've wired ECU pin 2I direct to the tach (by joining the yellow/blue and black/white wires at the ignitor). Do I:
  • Do nothing? :D
  • Set the tach output in software?
  • Install a jumper on the tach pins on the board?
Or some combination of the above?
By mater36
I did this on a 92 miata with a vvt engine as well. Tach output is just like you said. I connected the two pins at the igniter and used the jumper. The default settings for the tach output on tuner studio worked just fine.
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