Put the stock pcm back in, that stopped the rpm bouncing while coasting. In neutral while coasting it sits at 1600rpm, normal or not? (40mph). It also seems the car rolls REALLY good in neutral or overkills pcm unmasked a problem. SO maybe stock pcm doesnt allow the bounce, but overkills allowed it to bounce. I dont know how to explain it. Ill try it this way, overkill pcm decel the rpms bounce, 1100rpm would what I would assume would be the normal neutral/coast? As with the stock pcm it is not, and I bet I could coast twice as far with the stock vs overkill pcm..
And my start from stop acceleration is greatly better with the stock vs overkill...... Overkill it seems I need to get the rpm up more before it really gets going....