Why would my 92 Oldsmobile Achieva V6 3.3 engine have difficulty starting? on 1992 Oldsmobile Achieva

This is only after engine is warm.
Even worse in Hot/Warm weather.
It is as if the signal is not being sent to tell it that it is a warm engine.
I have cleaned the Massive Air Flow Sensor.
Otherwise it runs fine.

1 answer 2 comments
DO U HAVE A CK ENG LIGHT ON AND CK FUEL PRESSURE
No Ck engine light except when You turn the key over and before it starts. I assume that is to make sure the light is working. I have had different mechanics try to fix this and so far no success. Is there a process of elimination that I can narrow it down to something?
CK FUEL PRESSURE COLD AND WARM. POSSIBLY A FUEL PUMP OR FUEL PRESSURE REGULATOR