While driving down the road 1994 protege just

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Does anything work? Lights, radio? Do the warning lights and gauges turn on when key is turned to on? That would verify power is getting to the ignition switch and is being sent out.
Pretty limited in what you can check without a voltmeter or test light. If you have power to the ignition switch, need to know if power is getting to the starter solenoid on the starter motor when the key is held in cranking position. If power there, likely a new starter is called for-have yours tested.

no it

Whats the purpose of fuel shut off 94 mazda

Ignition module probably at fault. Shuts down when hot, runs after cooling off.

Do you have a big bunch of keys swinging from the ignition switch? Sometimes the weight of lots of keys wears out the contacts in the back of the switch and you end up with an intermittent case of the car dying. Try wiggling the key when you are driving and see if that creates your problem. If that is your problem, the only fix is a new ignition switch. This problem won't give you a code because, so far as the computer is concerned, you have switched off the engine and switched it back on again.

sounds like a fuel filter problem, when the engine shuts down,the blockage settles, then when driving, the fuel pump draws the blockage back.......check fuel filters

I had a Mazda 626 with a similar problem, the car seemed to 'shut down' with no warning, even at highway speeds, as if I just turned the ignition key to 'Off'; After trying to fix it unsuccessfully by replacing several electrical parts, the problem was found to be a defective ignition switch, it was replaced and the problem went away.

You need to Change the Thermostat.

The fuel cut-off switch was activated by the impact. Had the same situation. I can provide you with mazda service manual in pdf if you wish.