Hondata

No, you are right, it probably doesn't matter. Especially as my fuel consumption calculations, based on back testing against old ECU data and known fuel figures, is only proving accurate to about 10%. But I just wanted to check I wasn't missing something important.

I have some further calibration ...

Yeah, that is how we have it implemented at the moment, although it works out as 4us per bit not 250us?

We have implemented:

injectorDuration_us = (packet[11] * 256 + packet[12]) * 4;

but then this gives us:

OCAC = 3244, * 4 = 12.976ms (not 12.964 as documented)
O79D = 1949, * 4 = 7.796ms (not 7 ...

Hi,

I have built a microcontroller interface between the serial output of my Hondata ECU and the serial input of my datalogger system. All works fine, except I can't make sense of the injector duration data format in the serial stream, and I need this for some fuel consumption calculations ...