RomRaider

If you don't need to log the raw data for the wideband, I could do the testing for you. I think I could do it through logworks or at worse compare what I see between two logs.

We would need to log the raw data at the same time as the wideband.

Should be able to do it with logworks. Just need to mod the xml def. to record raw data instead of a calculated value.

EDIT: nevermind, it should actually be the same as "A/F Sensor #1 Current". If someone can log this with wideband data, then it should tell us what kind of range the front o2 might have, depending on your fuel map.

Here's the protocol xml file from LogWorks. Couldn't find it last night because I had an old version installed. Adding the front o2 current to this would be the easiest way to log.

Edit: Here's another (untested) version with front o2 added. I'll try it out here in a bit.

A separate variable needs to be logged for 16bit ecus. "A/F Sensor #1 Current" isn't going to give us what we need.

Can you post the data from one of these tables? Are the tables identical for all ECUs?

Here's a log of current, resistance, AFR from the front sensor, and AFR from the LC1. Apparantly I screwed something up at some point in the testing so the front o2 AFR is off, but everything else should be correct.

It looks like the current is just 0 at 11.25 AFR. No way to get around that. Oh well.

I'm having a hard time getting the hang of LogWorks.
Edit: Blue is LC-1, black is front o2. This would be a whole lot easier to look at if I could scale the input to the whole screen but I cant figure it out.

The 16bit front o2 scaling is already defined in the definitions but I haven't had a chance to make sense of the input which is calculated from "A/F Sensor #1 Current", but also is based upon the previously calculated value.

Here's an SS for an 06 wrx, for which the 32bit ecus use the A/F sensor #1 current value as an input. There's also an atmospheric compensation table (not shown).

Are you sure the axis is scaled correctly? I don't know what input it could be using that would have negative values (resistance, voltage, or current). The current, from my logs, doesn't look to be linear.

Yes, the axis is correct.

Use 14.5 as the stoichiometric A/F ratio instead of 14.7 and then you'll see what FHI engineers see when they look at that table.

Allright, plus here's the unmolested output:

The AFR to current flow relationship seems to match what Denso has published.

Well, this shouldn't be hard to set the first data point to header of -1.9 and AFR of 10, voila! Of course this doesn't help the fact it is WAY off anyway, but if you were going to try to test it post turbo.