My KIA Sportage 2001 will not accelerate and shakes violently until it shuts off.

What is your question?

As requested by a mechanic, I replaced the cham shaft sensor, had a tune up, replaced power steering hose, and had oil change. The car still does not go over 40mph and shakes violently when I come to a stop. It shakes so bad that it shuts off. Any solutions. Now im told to change the coil packs.