I just bought a 1990 Cobra Clone last week. It has edelbrock performer heads and intake, Moroso CAI, 24lb injectors, BBK long tubes and flowmasters. Car was running great until this past friday. I would get on it and at about 3500rpm it acts like you are feathering the gas. It pulls then its like it lets off then pulls and it keeps doing this. Just riding around the car runs great its not until you go to call for power when it acts up. Saturday I changed the fuel filter to rule that out. I have check all the wires and cleaned the MAS as well. Fuel pressure at idle is about 37lb. What am I missing here? Any help would be great.