Okay now before everyone jumps the gun, although there is a V in front of this AFC 
It works the same as any other AFC (SAFC, etc).
Anyways, I have for sale a V-AFC II, great condition, harness is long and clean so you won’t have issues mounting it in a convenient location.
The advantages of the V-AFC II over the S-AFC is with the SAFC you have only 12 set points for fuel whereas you have 24 points from the V-AFC II.
Don’t let the VTEC turn you off, this will work great for your Nissan.
Maxima VAFC II info: http://forums.maxima.org/showthread.php?referrerid=58751&t=463936
The unit retails at ~$500, I’m asking for $270 o.b.o
I can take pictures of the unit itself for those who are interested, but I can guarentee it’s in very good shape.