ok heres whats goin on with my ride: i am just drivin down the road and then randomly the car will just shut off,it doesnt sputer or chug, it just shuts off, kinda like i am turning the key off, but the key is still on WTF?

can some one point me in a direction to start looking for my problem.
also my egr system is all f-ed up could this cause it "i am just to lazy to put in my block of plates"

sorry for any bad spelling "wow this should be my sig" lol
thanks guys.