Engine shuts off without warning


I have a Mazda Protege 1991 with 250K miles on it. In the last 3 months, after 5-10 minutes of driving, the engine stopped running 5 times, without warning. The feeling is the same as if I had turned the ignintion off. If I try to start the car right away, it just turns. The car will start again after 20-30 minutes. The car always starts when cold. Replaced the fuel pump, but did not help. Brought it to the Mazda dealer, they could not see any code or anything else obvious that could be wrong. Any advice?

It’s obvious the Mazda dealer isn’t the place to go. There are good independent shops who will put more effort into finding the problem. You’re right, it could be the ignition just cut off. When fuel shuts off, the engine will usually give a few jerks before it dies.b