White Smoke, Rough Idle, Loss of Power, High fuel consumption on 2002 Dodge Grand Caravan

One day, filled it up, drove home 40 miles, no problem. Went out to start it the next morning, chugging, rough idling, put it in gear, loss of power, high fuel consumption...i.e. 1/4 of a tank in 10 miles. Whats the deal? Had spark plugs replaced and fuel injector replaced. What else could it be???

Asked by for the 2002 Dodge Grand Caravan