I have been running my 383 based on a L31 with a P59 using the 618 OS for a while now. I have run into two calibration problems that I would like to resolve.
#1) The AC will not work. I swapped to a GMT610 segment. The PCM reports the vehicle as AC equipped. The PCM sees the AC request. If the PCM has just been flashed it will enable the AC clutch for about 3 seconds. Then it will not re-enable the ac until a reflash. AC system works great with an 0411 in it and the system is wired correctly. I can enable the AC with Bi-Directional cpntrols. The PCM is not throwing a flag for the AC disabled due to WOT or Pressure.
#2)It will only use the Base Idle table and LTIT learned cells for Drive even if it is in Park/Neutral.
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