Originally Posted by
kur4o
So i took another look at the supposed pump shot adder. After I examined some logs of data, I finally figured out what is does.
At rapid tps change, the maf readings jumps alot too fast, the pcm use this pump shot as a scale factor to gradually increase or decrease the AFGS.
For example the AFGS jumps from 20 to 100 g/s at one frame interval. PCM blends the increase to 30, 50, 80, 100 over a period of couple of frames. That way you don`t get erratic jumps in fuel bpw and engine runs smoother and more consistent.
So this factors how fast the transitions happen. I guess the lower the value the faster the transition. Still it needs to be confirmed.
It turns out maf reacts faster than the time needed for the air to get to cylinder. That`s why there is no ae build in the code.