I have a 1996 R33 RB25det. I recently replaced rocker cover gaskets and once everything was back together when I turned the car on it has a really rough idle then with in 5-10 sec engine stalls. Can anyone point me to the right direction I have put everything back as it was and have double checked everything. Car was running mint before I did this. Idles Roughly under 1,000rpm before cuts. Note - car has been parked up the last 2 weeks. I was kinda just been changing gaskets in between work and spare time.