1992 Oldsmobile 88 INTERMINTENT STARTING PROBLEM

Electrical problem
1992 Oldsmobile 88 6 cyl 200000 miles

Hi Guys!
I just bought this car, did not know it had this problem, just my luck huh?
As it reads, this is an intermintent starting problem, Sometimes it runs and starts fine, but condition happens frequently. It usally happens after driving somewhere, then turning car off, when time to leave go out to car to restart car and she just turns over fine, but no start. Wait anywhere from 15 min to an hour and then she starts right up.

History from a mechanic who is working on the car now but stumped. His words- "No codes showing, even when problem presents itself" "Replaced cam sensor but problem still present" "looks like someone else has tried to fix problem because ECU has allready been replaced" "Checked when problem presented itself, there is No spark, but fuel system is working just fine"


I'm fusterated and Ready to light a match.