tps sensor voltage

[s13rb25det]

hey, I have being trying to find why my car idles like poo, and I have tested my tps sensor and found that it is opposite of what it is supossed to be. I get 5volts with it closed and .5 with it at wot. I read that nissan screwed up on the fsm and printed it backwards. can any one verify this? and if so what should the correct voltage be? both with the throttle closed and fully open. also I have read about adding an extra ground or a completely new ground to the iacv valve to get a better idle does any one know which color wire is the ground wire? and does this even work? sorry for all the stupid questions but I am tired of my crappy idle and am out of ideas. ohh yeah I just did a new tune up with ngk plugs, cap and rotor, and 02 sensor so that stuff is all good thanks

[DALAZ_68]

well at idle it should be .5 volts...as far as ground goes...usually go with black bro

[WWJD]

run sea foam threw your vac. line, then take the AIV out the car, take it apart and clean it good along with the IAA? I forget the name of it... anyway a hose connects it to the air box. the little black box on top of the IAA? was cracked on mine so I took it out. I ran the hose straight ot the IAA?