When using the NeedsRefuel condition, if there is a chestcart linked as part of a train, the switch recognizes the locomotive to not need fuel even when either the coal or water is low (I have had locomotives run out of both while testing).

If I remove the chestcart, the switch then recognizes whether the locomotive needs fuel or not as expected. This happens even if the chestcart is filled with a nonfuel item (mine was filled with iron ingots).

I was playing this on tekkit2 and the railcraft version is 12.1.0-beta-8.2