Car will not follow commanded AFR

Discussion of tuning specific to MAZDASPEED6/MAZDASPEED Atenza/Mazda 6 MPS vehicles

Re: Car will not follow commanded AFR

by mfinlay04 » March 25th, 2020, 2:16 pm

Bringing this thread back from the dead. Updated to 1.13.144 today and glad to see they added the ability to disable p2096. This CEL was a nuisance for us lean burn guys. I haven't explored the software for other possible changes, but maybe they fixed the issue with not following commanded age too? I'll be taking some logs again as I had some fuel trim issues I'm trying to straighten out.
 
Posts: 9
Joined: February 13th, 2015, 3:27 am

Re: Car will not follow commanded AFR

by mituc » March 26th, 2020, 4:02 am

If you are commanding lean AFRs, leaned than stoich, as long as the secondary O2 sensor is connected the ECU will try to bring it back down to stoich.
2008 Cosmic Blue Mazda 3MPS
Build engine + WMI + GTX3071, ~476WHP @31-32PSI
2008 Icy Blue Mazda CX7
Stock engine, intake and exhaust (YES!!), GTX2867 gen2 + Autotech HPFP, self-tuned to 320-ish BHP
VersaTuner guru
 
Posts: 888
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: Car will not follow commanded AFR

by Polish_Eagle » March 26th, 2020, 8:33 am

mituc wrote:If you are commanding lean AFRs, leaned than stoich, as long as the secondary O2 sensor is connected the ECU will try to bring it back down to stoich.

Agreed with this. I have disconnected my secondary O2 sensor personally.
 
Posts: 21
Joined: December 3rd, 2014, 2:33 am

Previous

Who is online
Users browsing this forum: No registered users and 1 guest
cron