I have a '77 280Z FI and have replaced the fuel filter, spark plugs, spark plug cables, cap and rotor, catalytic and also bought an Optima red top but I am having problems with the car stalling on me. I have searched and found that others have stalling issues with their Z/ZXs also. But mines will stall under 1600-1700 rpm. I'm thinking it's an induction problem, either air or fuel but I'm not really 100% sure about it. I have read several things on fuel and delivery but haven't found some fault that causes these symptoms. I appreciate the help.