Sounds like TC/TF might need to be looked at.
Where can I find throttle cracker in my tune? I only see throttle follower under b1604
Does the RAFIG/PN process work for E38?
No cracker or rafig/rafpn on the E38's. Check the idle sticky in the E38 section of this site for some really useful idle tuning information.
00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E