cold start problems - continued

[Steve Ensch]

I am still diagnosing my cold start problem on my 90.  What controls the
idle enrichment: as when the A/C is turned on, or during starting a cold
engine and the idle is automatically raised to 1200 rpm for about two
minutes or so.  Is it the ISV or a fuel enrichment.  Currently, the engine
wants to idle at 900 rpm no matter hot or cold, before it used to bump the
idle up during warm up.  Currently when I depress the pedal with a cold
engine it shutters or simply stalls or when I depress it even more I hear a
loud pop from the air box, and the rpm will climb.  More often than not I
have to restart the car 4 times before it actually will idle without
stalling.  What controls the idle in this beast?