Introduction and a question on poor starting.

[fixkick]

Howdy Partner !
hot start, late start. (does 10% throttle help ,yes or 100% then?) might be flooding, tiny be on 1 cylinder for injector leak.
The IAC thermal is closed hot, but not ISC, (not sticking)
Remove PFreg Vac hose, is it leaking fuel there? this love to fail (this old) and acts like injector leaks.
does test fuel help or make it worse? (my guess , worse)

engine wants air, so must be starved for air or , injectors leaks. or PFreg.

id run a bottle Techron in the tank on the hope it cleans that injector, if be it.

does key on 3 time help before cranking?

some ideas, wish you well and fix fix.

PS id test the fpreg big time, run it true the vacuum chart.

my crude chart