Car still stalls after the IACV change and clean

Good morning.

I listed some possibilities below for the issue. They must be checked to verify the failure.

Did you just clean the IAC valve or replace it? It cannot be cleaned as the area that is carboned up is not accessible.

Roy

Rough, unstable or incorrect idle/stalling - Definition: The engine runs unevenly at idle. If bad enough, the vehicle may shake. Also, the idle may vary in rpm (called hunting). Either condition may be bad enough to cause stalling. Engine idles at incorrect speed.

Check:
Misfire counts using Scan tool (if any exist)
Throttle linkage for sticking or binding
Throttle position sensor should read zero percent at idle on Scan tool.
IAC System.
Generator charging output voltage. Repair if less than 13 volts or more than 16 volts with all accessories off.
Injector Balance.
EVAP canister purge system
Minimum air rate
Catalytic converter blockage
Fuel quality.
Power-train mounts.
For DTC P1599 - see chart.
EGR pintle valve held open
Check Terminals and wires at EI module
Check Terminals and wires to crank position sensor
PCM power and grounds
Fuel pressure
Spark plugs and wires
Cylinder compression.

Monitor long term fuel trim values on Scan tool if system is running lean (block learn near 147).