Stupid question. Scaled tune and AFR comanded is double stoich.

[Nossty1]

Hey guys, Been quite a while since I have used the tuning software and am a bit rusty. I just got the newest software as well.

I am using a scaled tune for my 08 E38 for injectors but am having trouble getting AFR err due to my tables showing AFR commanded is double stoich. Can I adjust commanded to be correct? Ill probably just end up using lambda which will be fine.

[mowton]

Will have to make a User defined Math Parameter AFR/2...or as you said use lambda, much easier. If using AFR then you will also have to develop a user defined AFR error Math Parameter.

Ed M

[schpenxel]

Just use lambda for your wideband setup and then you can use "EQ Ratio Error" in charts/graphs/etc.

[Nossty1]

Jesus I cant even reply. Yes gentlemen, I chose to go with lambda.

[Nossty1]

7.14.16.hpl

[Nossty1]

7.14.16-2.hpl

[schpenxel]

Post layout

[schpenxel]

What you've got will work as far as logging/setup goes--just a matter of setting up the chart/graph to show what you want

[Nossty1]

layout 7.13.16.2030..Layout.xml

[Nossty1]

Busy few days with work. I am def having some issues. Overcorrection even %/2. Ve and timing must be way off. Meth is off for now.

[schpenxel]

If your WB is in lambda then you have to use EQ Ratio Error, not AFR error.

Try this layout file

I moved some stuff around to make a set of charts have commanded lambda, wideband lambda and WB error, makes it easy to see what's going on

The graphs you had were already working so I didn't mess with those

Looks like you're nearly maxing out the wideband on the rich side...

7.13.16.2030..Layout.xml

[Nossty1]

Thanks guys. I actually had a WB failure that was leading me astray. After seeing a lean condition on the plugs I not only went very safe on fueling but timing as well. I am not really shocked by the very rich condition. I am off the next few days so it looks like a few drives are in order as well as a trip to the track for some tests.

[Nossty1]

I am having some issues. When copying the entire graph then pasting the table by %/2 it leans out way to much in the startup area and wont start well/idles rough until O2 sensors take control. Do you think cell hits required>10 and at least 25% throttle in the graphs is conservative enough to combat this?

[schpenxel]

I'd have to see what you're getting to say, but it's obviously not working whatever you're doing now

[Nossty1]

Under very low pressure circumstances like 15-25kpa decelerating it is rich and if I paste those cells in to the VE the car will not want to run. Basically starting up very lean until the fuel trims correct the issue. DFCO is disabled.

[Nossty1]

This is only on startup cold. The warmer the engine and O2s the better.