Engine sputter then stop then start?

I bought this car 3 weeks ago. It was stored for at least 16 months, very low mileage as you can see. Mileage appears legit even though the odometer mileage not showing except briefly when you open the driver door (we think it's lost the connection to the VCM and needs reprogramming) because mileage correlates to the car fax and increases with driving.

After driving about 150 miles, the engine sometimes (irregularly) sputters at a light or stop sign, then stalls. Starts right back up. No engine lights on the cluster.

We thought it might be water in the gas tank, haven't put any Sea Foam in. However, it seems too long for that to be the case.

Any ideas?

Thanks,

Jon