93 olds 88 royale ls. cars starts runs for 5 to 15 mins then shuts down. everything else is still work just won't restart for 2 or more hours then it restarts and does same thing all over again?

Have the ignition control module tested ! GM Type Ignition System Troubleshooting Diagnosis and Repair by Wells EM

Does it start right back up and go again or you have to let it cool down ? Could be a bad crank sensor. Also seen crank sensor wiring harness issues on those.

my 93 olds 88 royal cuts off went we are driving

some cruise controll systems use the center high mount stop lighy [third brake light] as an input for the cruise control if its not working the cruise wont either. all fault diagnosis would conclude that if everything checks ok then the computer is at fault. but i would dought all checks ok. a skilled mechanic should be able to diagnose the problem in 1.5 hours and that is a generous time alotment.10 hours is extreme. so mabee a second diagnosis should be performed

car starts and idles good.it cuts off while driving,and starts right back up????????

We had this same problem. It turned out to be the computer. We had the computer replaced and it worked great for awhile but now there's something else wrong with it. Hope this helps and good luck.

suggest change crank sensor-rear of engine pas side

Try turning the key to the on postion-not crank, just to he postion right before cranking. leave it in that postion for 15 min, Do this three and after the third time go ahead an try to start it. Hopefully this will reset your security for you.

yes it can be the security system, find the two all white wires at the bottom of the steering column and cut them and solder the correct ohm resistor in between you will need an ohm meter to measure the resistance of the chip on the ignition key then install that omh resistor to the wires.

As the commenter said, check if the tranny fluid is full. A clear pink or red is best, a dirty brown or cloudy color is probably trouble. It's a '93- it is 24 years old, everything wears out eventually. I'm as old as the hills myself, and I can't run anymore. Start looking for a replacement transmission, or have a transmission shop diagnose it. Unless you are attached to the car, don't let them talk you into a new transmission-the cost may be more than the car is worth. You might want a used unit- try to get ANY kind of warranty-even 30 days is better than nothing. If it lasts beyond 30 days without a problem, it might go another 24 years---pshaw! not really.