Car Quits

[kimataylor]

Please help if you have any suggestions!
Currently I have a vehicle sitting in a shop, and they can't figure out what is wrong.
They connect it to a computer-and the computer shows there is nothing wrong with the vehicle.
They take the vehicle out for a test drive, and after driving about
about 5 miles or so, stop at a stop sign, car is warmed up by then, you start to take off again, it goes about 30 feet and jumps back down and quits. When put back in Park, turn the key, and it starts up again, an runs again for another 5 miles, until you stop again.

They have replaced the battery and map sensor.

Any ideas?