Nistune Forums

It was recommended that I adjust my closed loop scales. I read the manual and a post on here. I think I understand but I created a graph for visual reference to help me along the way.

If I'm understanding this correctly:
1) The shaded area of my graph is where the ECU will stop using long term trims in its fuel calculations.
2) Setting the closed loop load scales to "0" should prevent any long fuel trims from being used, this may be handy if your ECU doesn't let you manually reset fuel trims and or other diagnostic situations.

Is this correct?
References:
PDF: Nistune_Mapping_Guide v1.6, Page 21
Forum post: Closed Loop Load Scale - Explanation and Issue

The RPM and TP load scales reference a table in ECU memory which keeps track of the trims.

When the K constant is adjusted in the ECU, it changes where the ECU references this table. So for example if you change to Z32 MAF, then the TP may be doubled for example and scales normally doubled also

In this case we would double the values in this particular table, so they stretch out similar to other load tables (like fuel, timing and knock)

I would avoid setting to 0 as that may have undesired effects.

In the meantime disconnect the O2 sensor and see if is causing your issue (after unplug the ECU for a period of time)