Dear Members!

I have problems with N75 topic. I don't really know how does it works. What happens in this map? I have basic knowledge about open-close loop, but this topic is quite new for me.
In my family there is an Iveco Daily 3.0 HPi with EDC16C39 which make me crazy. Sometimes it goes to limp, and i think because of missing N75 calibration. So if in my map at the last column (40 mg) at 720 rpm show 85% and at 4800 show 60% what control these numbers?
I mean it force to decrease the target boost or to increase the target boost? Or why it has percentages?
If i have boost spike what do i have to do?
I know i have to log the vehicle, without log i can't recalibrate. But my problem is, i don't find any info about this topic.
Please somebody tell me how to start to understand it.
(Why should i calibrate also when i close the EGR or disable the DPF and how, should i increse or decrease the percentages?) :crazy:

Hi,

80% is max boost, 20% min. Stock config shouldn't suffer overboost, if mechanical failure fault only. Typically with EGR/DPF off you'd need to decrease %.

You need to log, limp could be from different issues.

80% its not max boost,its vanes fully closed,20% its fully open,if yo remove dpf,cat or egr you need too adjust a bit to prevent boost spikes ;)