Are you using HTTPS? Did anything change there? Connection timed out means there's an issue between the ACARS and site. Are you the only one having the issue?
Is that also an additional fuel used you want to do? It's probably better to do that in a module listening to one of the PIREP events. That way it won't get overwritten.
Edit: Sorry, just realized we already talked and you opened that Github issue. I'll be adding that in.
During the install does the "Check database connection" work? What're you using for the database host? 127.0.0.1 or localhost? I usually have to use "127.0.0.1" as sometimes the hostname of "localhost" doesn't work for some reason