the northstar signals fed to icm seems it will be complicated to nail unless we get some good scopes of the 3?
if using the northstar icm will be a step back then,
thinking from a hardware , software perspective or some combination of the two, could we not piggy back the opti signal into the arduino.
from there couldn't the high-res signal be used as a clk and then count the number of clock cycles occurring when the low res signal is 1?
with 8,3,5,2 having a unique number of clk cycles occurring during their low res signal being 1 this could be used to then sync the firing order switching cylinders upon each next low res rising edge?
still use the ecm est signal but use some type of hardware that selects which coil to arm based off the firing order sync?
disclaimer:
a lot of this stuff is way over my head so i may have just sounded like a complete idiot.
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