Car shuts down

I have a 2001 Mustang that occasionally shuts down during operation for no apparent reason. I’ve been trying to narrow it down to specific conditions, but cannot find any. It doesn’t specifically happen while accelerating, turning, entering a highway, going slow, fast or certain weather conditions. I’ve had the car tuned up, all of the wires and a cylinoid replaced. It occurs occasionally, maybe once every other week and has been going on for a couple of years. It’s driving me crazy. Anyone have a suggestion?

I would first suspect the ignition switch or the power lead to it, faulty power connection to the ignition system, or possibly a faulty fuel pump relay. You may be able to pin down the trouble area by tapping on suspected areas with a screwdriver handle.

Hello, you are the second person to suggest the ignition switch/system. I’m not necessarily mechanically inclind, would a faulty fuel pump relay cause the car electrical system to shut down completely? Thanks, I appreciate your advice.