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Hi guys,
I looked at a Suzuki Jimny 2021 that has been turbocharged and tuned.
When I was looking through the live data I noticed from a cold start up to fully warm running temperature that fuel trims both long and sort were at a fix 0% all the time as well as both o2 sensors at 0.455v and not moving one bid.
Could that be due to the tune?
Is there any other explanation for that?
Thanks George
What ECU was being used? What tools did you use to monitor those channels. If it's just OBD-II, are you sure the ECU supports those channels. It may respond to them, with non-sensical values. I have found this useful for understanding OBD-II
https://en.wikipedia.org/wiki/OBD-II_PIDs
Notice there are various "PIDs supported" fields that are supposed to identify which PIDs a particular vehicle actually supplies data for.
My Haltech Nexus R5 was doing this for a little bit right after getting it started for the first time. Then, after trying every setting I could, I reached out to Haltech and they looked at a datalog. They’d found the firmware version I had in the ECU had a weird bug with the O2 control “state” where it would stay at a value of 0 even if the conditions were met to turn it on. So, I was always at 0% trims. Once I updated the firmware, the problem went away.
All that to say, check the firmware of the ECU, make sure there aren’t any known bugs or updates that may address the issue you’re having.
