Extruder Seizing

[BLKKROW]

So I have been having a lot of issues recently and trying to get my printer working again.

I posted in the past that my extruder was clicking, well no matter what I do it is happening again. I have a Prusa IV3 12" with the following mods:

• New Z mounts with Anti-Backlash
• Gears on the X and Y Idler
• Cooling fan for bridging
• I am using the traditional Greg Wade extruder.
• The cooling fan for the extruder is blowing away from the extruder.
• Rumba
• Graphical LCD

I am slicing with Simplfy3D (3.0.1) and using the following retraction settings:

• Retraction Distance 2.5mm
• Retraction Speed 15 mm/s
• Coasting Distance 0.1 mm

I have tried to resolve it by dissembling the extruder and making sure the large gear is not loose and not tight. I have played with retraction settings by lower distance and speed. I purchased better filament directly from Makerfarm and measured it using digital calipers.

Now what am I missing? Please help I am fed up with this printer, I have spent more time trying to get it to print than printing useful objects.