Egnine starts and runs then stalls and wont start for 30 mins

What is your question?

The car will start and run for 15 to 20 mins then it quits and it won't start again for 30 mind or so and over and over again car is a 1986 Oldsmobile 98 regency brougham

How long has your 1990 Oldsmobile 98 had this problem?

Weeks