[78F350]

Here's one of the better discussions: https://986forum.com/forums/boxster-general-discussions/79397-996-986-instrument-cluster-question.html

I've found that the best way to search this forum is to do an entry like this in your search: site:986forum.com fuel calibration gauge
Entering a user name in the search will pick out useful posts from some of the more helpful users or help you follow along if there are multiple threads about a specific problem.

DDG: https://duckduckgo.com/?t=ffab&q=site%3A986forum.com+fuel+calibration+gauge+%22JF P%22&atb=v405-1&ia=web

Bing: https://www.bing.com/search?pc=MOZI&form=MOZLBR&q=site%3A986forum.com+fuel+calibration+gauge+%22JF P%22

I don't Google much anymore.