I do have a 99 GTP, before tuning with the Mini-Afc I was seeing around +10%-+11% Ltrims. I had to add around 3% on the Mini-Afc on the 1Khz-3Khz ranges, this brought my L-trims down to around +2.6% - -2.6%. My cruise L-trims were around +5-+6%, so I added 1% of the Mini-Afc to get them around the same values as above.
I found this article to be a really good start on tuning your L-trims (Granted it is an article for a Mini-Afc 2.0, but it does give a good idea on what to look for
Here is some info from the article regarding LTFT'*:
"LFT1 – LFT1 is used for tuning with the AFC 2.0 at Cruise and Idle. WOT uses O2L which we will talk about later. If you are see large negative (-) numbers here, you will most likely want to turn your fuel down (take fuel away). The reverse goes for large positive (+) numbers as here is when you want to add Fuel.
Large Positive (+) LFT1 = TOO LEAN
Large Negative (-) LFT1 = TOO RICH
You want your LFT1 reading as close to 0 as possible but +/- 5 is an acceptable level. I have found that a 1% Increase/Decrease on the AFC 2.0 Equals about 2-4 Increase/Decrease on the LFT1 reading. "
We did not check Kyle'* LTFT'* at cruise since we didnt have much time at the end of the day. But hopefully we can get some scans in for him, so we can see his KR, IPW, Ignition Timing, O2, etc...
I don't have a cam or rockers. I'm guessing from your screen name Joel that you have a 99 GTP, did you check the LTFT on yours before tuning with the AFC?
My 2000 GTP also had idle LTFT values of +16.4% on an OEM PCM.
The high value at idle is normal as far as I know Joel. Do you happen to have the rest of the values from your scan(*).