Engine stalled and shut off while idling, now stalling while driving.

I had to only once. Every other time I had to push it to be able to start it back up after it stalled out while it had been running.

Well, if it started when pushing it otherwise, I would rule out the inertia switch. An inspection of your fuel supply (pressure) and your spark (cam sensor, etc) is necessary when it cranks and doesn't start. This way you can isolate what system, at least, you are looking at when you diagnose it.