Stumbled upon an imcompatibility between steves carts and Extra Utilities, When placing a "Wireless RF Heating Coil" from EU in any cart equipped with a Coal engine/Tiny Coal engine the game will instantly crash. Once reloaded the Cart will have moved slightly and the coil will have been destroyed, I collected logs several times and they are consistently as shown here:
http://pastebin.com/Zjv3GQBK
This happens with both mods updated to their most current versions and no other mods installed, the Cargo manager is unable to insert Coils into carts as a fuel also however it does not cause a crash and merely ignores the coil.

I dont see this an issue with my mods code. Feel free to correct me.