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I spent entirely way too much time trying to get one of these style extruders on my Ender 3. Maybe I picked a knock off without realizing it, maybe mine was just defective, I'm not entirely sure.
But it was ultimately the cause for my printer underextruding on certain layers. If you need a new extruder, go for something better than these cheap $20 ones and get an actually decent one.
But on the bright side, my printer is finally fixed! It feels nice to be able to get back into the hobby again.
Got one of this for about 2 years and it is working well. Did you try to adjust spring tension? Also, 20$ is too expensive for those. They cost about 10$
Yeah, adjusting the tension didn't have an effect.
And yeah, it's too expensive for what it was.