Big.. this could be an ECU issue. Could be a fuel pressure issue, could be an ICM issue.
So far.. what do you know about the car.
Has it been acting this way for a while?
Was fuel that might have water in it, just put in?
Has the fuel pressure been checked?
On the plugs, bosch plugs break down quickly in a waste spark system, our cars do use this system.) However..you should be able to figure out the problem before changing them. They are too new to worry about at the moment.
Also.. please use the below Techinfo procedure to pull any diagnostic codes