I had my exede taken out, because I bought the car with it and it started acting funny, so I took it to the dealership and they took it off. My car was sending misfire codes at the crank and cams. Could I plug the xede back in and it would do the same or will I have to get the maps put back on before doing it. Also is there any reliable shops in Las Vegas that will tune my car, its running like shiz.