Making a new thread as been trying to work out idle surge on my 97 burban. It is swapped with e38 ecu and does not currently have ac signal going through the ecu due to complications of getting ac control to go through e38. Idle is relatively decent even down to 700 rpm with ac off or in gear, but in park with ac on it will surge. Motor is 8.0l bbc with brodix race rite heads, single plane intake manifold, and cam is 233/233 @.050" .600"/.600" Valve Lift 114 LSA. 1000cc FCI injectors. There is a turbo to be installed once I get the NA tune parts sorted out. Tried to play with various changes on adjusting idle air and spark settings. Also transient mass fuel adjustments as have a very lean spot on sudden throttle change from idle. Recently tried reworking VVE and appeared to be some better but not much difference. Was trying to see if maybe there is an obvious direction that I am just missing that someone might be able to point me towards. Attaching current tune file and idle warm up log.
2008 E38_T42_tune_45_VVE_change.hpt
run102_tune45_idle_warmup.hpl