Car stalls when driving on 1995 Buick Roadmaster

My 95 Roadmaster stalls when driving. No discernible sounds coming from engine prior to stall, just complete shutdown. Sometimes I am able to restart the car immediately, sometimes not. I have taken the car to a mechanic twice and they have been unable to diagnose the problem

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1 answer
The problem, being intermittent, is hard to diagnose. But hopefully you will be able to catch it in the act one day. I would anticipate it would be a lack of spark or fuel pressure that occurs.