Some people mess up their flow setting and set it to 1 (1%) instead of 115% or so needed for ABS. Could this be it?
Turn the extruder gear by hand when the nozzle is at temp. How does it feel? Does it come out all nice and squirty? Raise the temp just a bit - 5C at a time. Maybe the spring in your extruder setup slipped and needs tightening? Look at the delrin wheel inside the extruder carefully. Does it spin? Does it have a flattened side to it? Is it jammed?
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illuminarti 18
235 is rather low for ABS.
Also, what are you using to slice? Are you sure your slicer settings are ok? What's your packing density/flow settings?
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