FiTech Initial Setup

Hey buddy, sorry i completely spaced on your PM

Thats telling you to set the pulse width modulation to a lesser value if you have the FCC installed (fuel command center) so the pump isn't running full bore at lower power settings.
If you are using the FCC (sorry, i don't remember if you are) back that value down to 40.
as seen here.
http://fitechefi.com/fitech-uploads/2016/07/GoEFIPulseWidthModulationInstructions_withpictures.pdf

the vr advance 4000, is an assist in syncing the timing of the engine to the fitech. Various signals can cause distortion, so they have you do the static check with the base timing at 4000 rpm. if the timing is wavering at 4000, and doesn't match the same value as base...then you adjust this value to get it to match.
http://fitechefi.com/fitech-uploads/2016/07/HandheldcontrollerfeatureDefinitions.pdf