One reason why your 1994 Nissan Altima could be sputtering at an idle is because of your spark plugs. It could also be caused by the idle sensor.
May be computer controlled and not adjustable
Your throttle cable, needs to be adjusted.
How do yu adjust idle in a nissan sentra
The idle air control valve on a 05 Nissan Altima is located on the vehicle power pin. In order to check it, you will need to connect an OHM meter.
I'm no mechanic but it sounds like a transmission problem to me. Try to be a bit more specific with your question as it may also have something to do with the fuel system.
right above the oil filter
Numerous things could cause the Nissan Altima to stall. One such thing is the idle control valve, also the exhaust system could cause the engine to stall.
underneath the intake manifold, bolted to the cylinder head.
Rough idle, loss of power, poor mileage.
MAF
No load in park or neutral 700 give or take 50rpm With A/C around 800rpm
The fast idle-speed on a 1994 Nissan D21 pickup is adjusted by turning the screw on the side of the throttle body. It increases the speed of the engine when the vehicle is idle before completely warming up.