High Idle when hot - low power on up hill

[fixkick]

unlike many other cars of the era
this car, key codes are stored, codes
then you start engine, and its live codes,
the drive, and same.
all harmless, , unlike some cars.

the blowing in the hose in IAC work, free path of air there?

good news, the blasted it good, that ISC, it will not let water pass and to the next device, in the chain of 3.
all 3 must flow water. or IAC goes nuts , followed fast with ECU , confused. (it's lil brain , does so easy before, obd2)

you Sr, are on TRACK !