Originally Posted by
modularfox
For the fan PWM question, I also haven't tried changing the PWM to 128hz like the description says, stock factory setting is 100 hz - has anyone tried changing it? currently the ECU is a stock tune with vats 1 and 2 disabled. Retrofitted a BMW PWM fan and works correctly when commanded via HPtuners, but when started, it maxes out to 89% (per PID commanded request), if I override it with VCM controls, it works as it should. All sensors on the engine are connected except the 3, a/c pressure, a/c control valve and compressor.
Any ideas on what to try for either. If I stumble on the answer and figure it out, I'll post up and not just abandon the thread with a "I figured it out, thanks" post... lol.