When leaning the fuel mixture on a C172 using the lean assist feature on the G1000, the hottest cylinder's EGT will be displayed, along with a reading showing the difference between the current temperature and the peak temperature recorded.
Whether rich or lean of peak, the delta should be negative, indicating a temperature colder than the peak. In practice, however, this number can be positive. What does this mean? Isn't a temperature "hotter than peak" simply a new peak temperature? Does it mean a different cylinder has surpassed the original cylinder's peak? (I am allowing the G1000 to automatically select the hottest / displayed cylinder.)
The instructions for leaning in the POH say to find peak, then enrich the mixture to 50 degrees below peak. How do I incorporate positive delta peak readings into this process?