[vettestr]

Gary,
I must be missing your point, can you tell me in a different way? It is all blending together, what am I missing here? It is not entering open loop at cruise as verified by logger. It is correcting/removing fuel but to reasonable 02 readings and have increased target points multiple times.

I am entering closed loop at 99 degrees and remain closed until until close to full throttle (maybe 7/8's of full range). So engine is closed loop during or when the surge happens, confirmed by data log. In closed loop it uses the map parameters but adjusts to feedback from the 02 sensor so always delivers desired A/F ratio. On cruise and closed loop it is definitely correcting or pulling a little fuel to reach desired offset but final 02 reading shows a fat mixture. I have increased that offset twice without resolve.

Thanks for taking time to explain your points. Jeff C