My only idea of the top of my head is trying another heater block. Make sure you use thermal paste as well to help with heat transfer. I know those probably won’t help, though. I posted, though, to mention I was running a BIQU B1(Peice of Crap) using BIQU’s HS2 V2 lite(love that, though) extruder. One print went fine, and then I was suddenly overextruding. I had to change my steps from 930 to 250 or so. Then, after powering down and turning back on, my number needed to return to the 930 value. Very weird, especially without a shutdown.