Hi guys,
I don't understand this thing (see log attached)
I don't understand why around 4000 rpm it has been a decrease in the net of the pair\diesel injection.

now I do not know if the couple collapses and pulls down the diesel,
or if, as many say, the pump fails to maintain pressure at the rail, and then reduces the time of injection and to follow then collapses the couple...
what do you think?

log.jpg