Installed new coolant temperature sensor

So after that (not so) little gremlin attack, I started researching the possible causes and decided to start with the small (read: cheap!) stuff.  The coolant temperature sensor was the first on the list.

First I thought I'd have to take off the fuel injector rail to get to it, but it turned out it was only the electrical connector rail (to the fuel injectors) that needed to be removed.  Quite simple really...