I have a 1998 Toyota Camry 2.2 eng. 4 cylinder. When the engine is cold it stalls but once it warms it runs as if nothing is wrong, very smooth.
I have replaced the EGR Valve, the Vaccuum Modulator and VSV. The check engine light is not on. Any help and info is gratly appreciated.

Check/replace the Engine Coolant Temperature (ECT) Sensor.

Also recommending a throttle body cleaned, paying close attn to the idle control valve.