Inconsistent extruding from nozzle

[noiseboy72]

While the hot end appears to be all metal, I'm not sure that's an e3d v6.

In my case, Certainly my E3d v6 was genuine and it was not fitted with ptfe tubing or a liner. The Bowden tube must run all the way down to the heat break. In my case, I inserted a shorter length into the extruder to make removing the Bowden easier when clearing jams.

Appreciate that direct drive extruders will require just a short length within the extruder, but it's important that the tube is a fairly tight fit as it has a tendency to move with retraction and leaves enough of a gap for soft filament to spread and jam.