I've seen some posts around that people don't really 'feel' the car in rF. A thing I've also suffered from in the beginning.
I then used Realfeel, but found this much better plugin:http://www.rfactorcentral.com/detail.cfm?ID=Leo's%20FFB%20plugin
It feels very good. For instance, in a Champcar when standing still, the wheel turns very heavy and doesn't spring to the centre when you let go. That only happens once moving.
With this plugin I hammered all my previous rF PB's but it also made me much more consistent.
So download it and give rF another shot, and mods will come to live once again