Just recently installed the E3D on my taz 4. when I go to pronterface and perform the PID tuning it would reach at 190c then it would show it failed due to time out. I made the changes on the config for the thermistor before performing the tuning. I swapped out the thermistor thinking it might be bad with the screw on thermistor from my other printer and I get the same message.
SENDING:M303 S230
PID Autotune start
PID Autotune failed! timeout