Thread: Air Regulator proper operation?

Is the purpose of the air regulator: to open wide open when cold, to supply the motor with the extra air it needs when the IACV calls for the high cold idle?

When the motor is warm the valve should close some but still allow plenty of air so the car can idle?

My Air regulator is almost totally clogged when warm. Car started having issues stalling when coming to a stop and also stalling when trying to set idle with tps unplugged and screw all the way out.
For now I bypassed the air regulator and all is well with the car (SO FAR)

I am going to assume it will still idle fine when cold because it has plenty of air supply. Am I going to run into any issues without it? Why does Nissan use it then?

What u are describing is the idle control solenoid that is on the passenger side of high port IM. The air regular is located under the IM. The air regular only supplies extra air for when the engine is cold. The idle control is for engine idle under all conditions. If the IAC is clogged maybe cleaning might fix it, I've never had luck with that. Replace it and the gasket and u should be able to set idle to proper rpm. I've set my idle by unplugging the IAC and adjusted screw to target rpm.

http://www.sr20-forum.com/information-library/50162-ins-outs-stock-idle-control-system.html

Thanks for the explanation Ben! I got it now. Well one thing, does this bi-metal thingy only work via electricity? As in hot VS cold temp (air) has no effect on valve.
I thought fully open when off and still open some on.
So its open when off and closed with electricity supplied?

Well I wonder what's wrong with my junk then haha................

The internal electric heater speeds the closing of the valve. Without it, the valve will warm up eventually and fully close, but it takes longer. Yes, the incoming air and the engine in general will heat it sufficiently (eventually).