2002 Saturn SL1 Engine shuts down while driving

Engine Performance problem
2002 Saturn SL1 4 cyl Automatic 140000 miles

Hi there.
While driving my car would just shut down. It wouldn't stall out or nothing, the engine would just stop.
It hasnt happened when im cruising on the highway, except for the engine is about to shut off (rpm goes to zero, speedometer goes to zero, all the MILs come on), but then reboots back up before actually dying. But has often times just shut off when I'm slowing down or speeding up and just driving through town.
The problem has been getting progressively worse.
Now when I try to turn the key, it makes some pretty nasty noises. Similar to scraping noises, although it does start.
I ran OBD2 through it, no codes were there to retrieve. The service engine light only comes on when the engine quits, but as soon as I turn the car back on, it disappears.
Another thing I noticed is that driving home the other day, the odometer said I drove about 70 km when really I drove maybe 20 or 30 (it quit on me twice also). However, the final mileage on the car I believe is correct, based on the mileage I got in between gas fills. Must be electrical?
Please help.