cranks right up in the mornings , but after sitting in the heat of the day in the afternoons my 92 bonneville will crank up after 2 or 3 attempts tapping the gas pedal. Is there any cause for concern? thanks in advance for any info.

Check your coils and plug wires. Make sure everything is clean.

Id test or change the O2 sensor if i where you iv done practically everything except that & im still getting that symptom, will update after this weekend (gonna pick 1 up)

What about the IAF Sensor, could that be another possibility? Is there a pic available showing its location

if your referring to the intake air temperature sensor its located on the back of the rubber hose going into the air box. I think you can clean it with wiring harness cleaner along with the male/female connectors to see if it makes any difference.