Change the FUEL FILTER, back by the right-front corner of the tank, up in a recess. You need 6mm and 10mm 1/4" drive sockets, 2" extension and ratchet. And, of course... a new filter.
From your description it sounds as if it MAY be your tires. When sitting for a long period of time (overnight) some types of tires develop a 'flat' spot which causes a shaking sensation when you first start driving the car. As the tires warm up from driving the flat spot goes away and the shaking disappears. Just a thought. Good luck. I have a Ford Focus myself and this happened to my car I replaced My Spark Plugs and Wires and it never came back. Try that. If that doesn't work it could be something more serious. You may need a full tune up, or you may be suffering the effects of a factory defect in the engine mounts. My son's 2000 Focus had the same problem; a vibration when the car was cold that would go away after about 20 minutes of driving. The dealer replaced the front motor mount and the vibration was eliminated.
engine stalls sometimes driving
sell it
If you able to restart after a few minutes, then your CMP is defective.
Diagnosis: Engine Won't Start or RunCheck related link below
Are you putting it in reverse? Sometimes when the Transmission Fluid is very low, and you have been driving, then stop to put into reverse, the engine will cut off. Ck Trans. Fluid.
If it simply dies without hesitating, I'd guess your crank sensor.
The alternator is not working properly. Your car will still run off the battery for a little while then when the battery dies the car dies. Check the alternator or take it to autozone and they will check it for you.
mine is doin the same thing
mi escurcion xlt 2000 cuado menos esperas se queda sin estarear y despues de 30 o 45 minutos vuelve a estarear..
Died while driving? Alternator
A very dirty fuel filter, contaminated fuel (water) or a faulty fuel pump.