Check these to have 256, not lower:
#define BANG_MAX 256 // limits current to nozzle while in bang-bang mode; 256=full current
#define PID_MAX 256 // limits current to nozzle while PID is active (see PID_FUNCTIONAL_RANGE below); 256=full current
Also, double check for mintemp and maxtemps stuff.
For further testing put instead 170, try like #define EXTRUDE_MINTEMP 195
so if it plastic gets too cold at least wont extrude anything, to not force extrusion, at least wont turn into other problems.
Does the extruder heats up properly with the bed disconnected?
Check for futher shorts between the extruder metal block and the thermistor wires, maybe it touches at some point and gets incorrect readings.
#define BANG_MAX 256 // limits current to nozzle while in bang-bang mode; 256=full current
#define PID_MAX 256 // limits current to nozzle while PID is active (see PID_FUNCTIONAL_RANGE below); 256=full current
Also, double check for mintemp and maxtemps stuff.
For further testing put instead 170, try like #define EXTRUDE_MINTEMP 195
so if it plastic gets too cold at least wont extrude anything, to not force extrusion, at least wont turn into other problems.
Does the extruder heats up properly with the bed disconnected?
Check for futher shorts between the extruder metal block and the thermistor wires, maybe it touches at some point and gets incorrect readings.