Hi there,
Reading this post I may have a similar problem, but the experiance was SCARY!...

Driving home at midnight last night from Shepparton to Melbourne on the Hume Hwy, out of nowhere while travelling at 100km/h I had this massive kick/jolt as for a second and then the car lost complete power. I pulled over and the car died. I attempted to start it with no luck. So I took the key out, back in and the car started again. Note that I had the cruise control on. About 5 min later with the cruise on, the same thing happened!...

Again, took the key out and the car started. This time I didn't use the cruise control and made it home. Has anyone experiance this problem?

On another note, I am looking at getting the tool where I can run in a diagnostic to check the car for any faults. Any suggestions where I can get one from?

Thanks!