I know it's been a week since this post, but I went through this recently so hopefully I can still help.
I extrude at around 230 degrees, everyone is a little different based on how accurate your thermistor is, if it's insulated etc.
if you are getting ooze and it only works well when you push the filament through you are probably stripping the filament and without you pushing it through it has no pressure. I had the same problem, the bolt was shaving the filament instead of gripping it. What I ended up doing was egtting a new M8 bolt and WITHOUT cutting a groove in it for the filament I too a dremel cutoff disc and cut a bunch of bite lines into it. It grips extremely well now. The only drawback is that now I have to take the tensioner block off in order to start new filament, it doesn't feed past the bearing and M8 bolt on its own into the opposite hole. I could probably angle that hole a little to make it work though.
good luck,
Anthong