Hey guys, kinda new still on tuning lsj's, but I'm having an issue with my buddies lsj at wot. At about 5200 rpm's the afr goes from 11.5 slowly down to 10.0 by 5800 rpm's. I've tried everything that I could think to do and nothing is working. Last month we did some logs and everything looked good, except the wot afr, and it bogged hard up top. Today the fuel trims were off a bit but it basically did the same thing, except I got the bogging to stop.
Also at idle, the timing jumps around and I think that's what is causing the idle to jump around. But I don't know how to adjust for a smooth idle timing. I've tried a few things but nothing has worked.
I'm at a loss guys, any help here? I have attached the tune and the last log of today.