[urq] Hot Start Problems Continued...

[Pasqualoni, James E]

The Symptoms:
When cold, car starts immediately upon cranking.  Runs great with no issues.
Idle is strong and steady at 850 rpm.

Hot Starts:
When attempting a hot start, after the car has been sitting for a few
minutes, it immediately catches, stumbles, then stalls.  Car will continue
cranking with good spark, but there appears to be some vapor lock or
flooding-not sure.  No strong smell of gas at all.

What's Been Done:
-New 85 deg C injector cooling fan thermo switch.  Injector cooling fan
works fine
-New vacuum thermo switch (the one on the block near the ig distributor
-Checked for vacuum leaks-none found

What should I pursue next?  I was leaning towards fuel pump check valve,
then injectors.  Does this make sense?  I don't believe that there are any
vacuum leaks, however, I will keep checking this as well.

Thoughts, suggestions, please?

TIA,
Jim