Not completely, the computer can still adjust the timing changing the rpms a few 100 in either direction. I tried unplugging the stepper motor when I was having erratic engine speed fluctuations when in low range on my last camping trip and it helped but the engine speed still varied at low speed without me changing my pedal position. Unplugging the VSS completely smoothed things out. I have no idea why but the computer was advancing the timing as soon as the vehicle started to move. Reguardless of if I had my foot on the gas or not. Very annoying if you were trying to inch down a trail in low range at 1100rpm and all the sudden the rpms kick up to 1800 on there own. I’ll check the tune number on my computer tomorrow, maybe the timing adjustment and stepper are something the auto computers adjust differently