If its the 4.6 engine it's all the way in the back of the engine left of the Throttle Body.
The idle control valve for your 1995 Nissan Maxima can be found on top of the engine. The idle control valve will be attached to the back of the injector fuel pump.
idle control valve
where is the idle control value on a 1995 cadillac sedan deville
There really isn't an adjustment just the IAC valve which may be dirty causing the idle to be too high or too low so the Idle Air Control valve has to be cleaned or changed.
to the right
Where is ideal air control in kia sportage 1995
its on the trottle body
it is attached to the throt. body held on with two bolts
it's the idle control valve, $60 part, or the computer.
It is on the base of the throttle body.
at the Ford dealership, it cost $396.00 to replace.
The IAC (Idle Air Control) valve is located passenger side in the rear of the intake, real pain to get at. It's to the left of the throttle body which I would remove for better access.