IAA valve?

[C-Walk]

okay so i got a nasty low idle. replaced vacuum lines checked ignition wires spark plugs and everything i could think of. But i was reading that it could be the IAA valve cause sometimes they just go and i can have Nissan adjust this or just replace it myself. I was wondering if this sounded correct. My car idles weird in neutral and when comming out of a gear or after downshifting the cars idle fluctuates from 1100rpms to 200rpms. Then finally rests at 700rpms at a dead stop. Playing around with the heater and defroster actually helps keep the rpms at a little higher. Also moving the steering wheel sharply at a dead stop makes the rpms shake.

[The Mic]

Most 240sx's eventually have a problem idling. This is related to the IAA valve which control the air mixture during idle. The two options to fix this are to have a dealer adjust the valve or simply have it replaced.

The symptoms are clear: as you hit the clutch or lay off the gas and the car begins to slow and idle the RPMs may drop (sometimes quite rapidly) to extremely low levels, sometimes actually stalling completely. If this is happening have someone check out your IAA valve and you may wish to clean all the ground wire connections for the car's ignition and injection system.