- Mon Jan 18, 2021 9:13 pm
#47705
Hello,
I have a Mazda mx5 na6 with a speeduino pnp. It works quite well but I still have quite some issues to resolve (idle dip in closed loop idle turning CL idle unusable, afr/O2 'weird' behavior of pid, heat soak issues / iat temp compensation, weird injector dead time behavior,...).
TLDR: after turning off afr/O2 correction car cranks at max PW set in speeduino (65,... ms) and floods the engine. If I turn afr/O2 back on everything returns to normal and calculation is correct and car starts.
I was experimenting with the afr/o2 pid tuning which is acting weird (changing the values does not seem to really effect the performance of the controller, not reaching target at idle and other rpm,...). I decided to turn it off because I wasn't finished tuning it yet and suddenly the car didn't start anymore. After a closer look, I saw that my cranking pw was maxed out at a bit over 65 ms. I once managed to 'fix' it but I don't know exactly how. Just keep putting it on and off and even reuploaded the firmware twice. If I turn afr/O2 back on, the cranking pw calculation works fine as before.
Kind regards,
David
I have a Mazda mx5 na6 with a speeduino pnp. It works quite well but I still have quite some issues to resolve (idle dip in closed loop idle turning CL idle unusable, afr/O2 'weird' behavior of pid, heat soak issues / iat temp compensation, weird injector dead time behavior,...).
TLDR: after turning off afr/O2 correction car cranks at max PW set in speeduino (65,... ms) and floods the engine. If I turn afr/O2 back on everything returns to normal and calculation is correct and car starts.
I was experimenting with the afr/o2 pid tuning which is acting weird (changing the values does not seem to really effect the performance of the controller, not reaching target at idle and other rpm,...). I decided to turn it off because I wasn't finished tuning it yet and suddenly the car didn't start anymore. After a closer look, I saw that my cranking pw was maxed out at a bit over 65 ms. I once managed to 'fix' it but I don't know exactly how. Just keep putting it on and off and even reuploaded the firmware twice. If I turn afr/O2 back on, the cranking pw calculation works fine as before.
Kind regards,
David