Looks like the map is capped at 20kpa. And you are loosing resolution. ALso when the throttle is off at some points the dfco is engaged.
There are spikes on a tip in also.

I will look if we can rescale the map output alittle. What map are you running. We need to make sure its output is linear throughout the range.

Do you have a second map that can be hooked on the engine. I guess that readings are approximate only.

I will look at some code to see how it can be fixed.