How to import Term reference (autocomplete term widget) inside field collection with Feeds & feeds tamper
A couple of things.


You are using a very old patch. In my implementation I am using the one in #102 (I see its now up to #119)
https://drupal.org/node/1063434#comment-7395840
You need to tell feeds that it is ok to create new terms for you. Once you've added the target in Node processor > mapping for the term reference you can change it's target configuration (the cog icon). There is a checkbox there 'Auto create'


[edit] Please use the new patch in #121 https://drupal.org/node/1063434#comment-7792223 which corrects your issue.