GTR running troubles

Please can anyone help. I own a 97 Skyline GTR that is running on 5 cylinders most of the time. I have taken the car to nissan and they have replaced the plugs and number two cylinder coil pack, and the problem is still there. nissan wont work on the car anymore and they cant find anyone that will find the problem either. I think it has something to do with the electronics but not sure. If anyone has any ideas on how to help it would be greatly appreciated. Cheers

Please can anyone help. I own a 97 Skyline GTR that is running on 5 cylinders most of the time. I have taken the car to nissan and they have replaced the plugs and number two cylinder coil pack, and the problem is still there. nissan wont work on the car anymore and they cant find anyone that will find the problem either. I think it has something to do with the electronics but not sure. If anyone has any ideas on how to help it would be greatly appreciated. Cheers
what kinda mods have you done to it? if it's still stock you might wanna check your airflow sensors your timing sensor or the box on the back of the valve cover, i can't remember what is call but check those 3 things and pretty sure you will find the problem. i was having the same problems with my 34 and it end up beign the airflow sensors. do all this and let me know what it was.