1995 Nissan Maxima 95 Maxima stalls & makes squealing n

My 95 Maxima began randomly dying on me about 2 years ago. It's only done it a handful of times since then, I'd say every 2-3 months. It happens while idling or going slowly, under about 20 miles per hour. The engine completely loses power, and when I try to restart it turns over a bit but normally starts back up pretty easily.

Also, once the engine is warm (after driving about 10 minutes), it makes a high-pitched squealing noise while idling. It stops immediately when I put my foot on the gas. It continues even when in park. I'm not sure if these two problems are related.