Robbie from Motech or ronjenx or White13JKUR could probably describe it better or confirm my suspicion about you fluctuating data graph from the 3.8l cooling cycles in lower image ; I am tempted to suggest that the 20second / 20° up & down pattern may be by design considering that the cooling was being controlled by a double-wrapped ,voltage divider thersistor controller of the fan.
in essence , you have a stepdown resistance in effect based upon temp that repeatedly cycles based upon fan cooling....
I think that would be a 3.8l cooling data graph for any of them.
I maybe wrong .
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.