This is the last of the “trim values” which lets you adjust fuelling by engine temperature. This could be to richen the mixture a bit for improved starting in cold weather, or adding additional fuel to cool if it’s running a bit hot (though really it shouldn’t be going over 120).
So far I’ve not really messed with this too much. The engine seems happy operating in the 70-90 range so this hasn’t really applied much to a warmed-up engine. It may still hold the key to improving the cold-start reluctance that I still have to some extent on the gen3.
♦ I am not currently clear if this is the ONLY cold-start enrichment happening from a cold start, or if there is some sort of “baked in” warm-up enrichment (like “choke”) as well. I have asked and will update here once I know.
