Sorry never got to your pm, I've been working from 8am-11pm the last 5 days.
You should post up something on the powrtuner forum, some people still check it.
If you don't already have UVscan or eddies table modifier, i would get them.
Eddies table modifier makes maf tuning really easy and is easier to sort your scans. I think the tuner notebook may explain how to maf tune using that program, but after the program makes the changes, be sure to view the change log and notice the differences it makes in the maf hz ranges and each other column.
To lean it out, I would import the scan into eddies table modifier to view the scan easier. This way you can sort it using maf hz, 02 mv, kr and so on. If you sort it by maf hz and see the upper 10k range or so and then see how that correlates to your 02mv, you may see where the 02 mv drop when you get lower in the maf hz. What you want to do is determine the maf range that your hitting and how far it should be raised. Say you notice the 02's are noticeably higher from 9000hz to 10500hz. What you would do is take 9000hz to 10500hz and subtract 3% or so from that range. (Subtract to take away fuel, add to add fuel) You also don't want any large jumps in the maf table, so you also take a few cells below 9000hz and you blend them, as well as a few cells above 10500. After you make the change, upload it and reset the fuel trims. I would then look at the wideband and see if there was a difference after making sure the fuel trims locked in at 0. Go from there in determining how much more to change or take away to lean it out. I would do it in small steps. You can't really rush maf tuning or tuning fuel in general or you will run into problems, patience is key.
