First it started out as almost like it would hit the rev limiter at 5k rpm. It would not rev past the 5k -5500k area. After changing the computer, crank angle sensor, mass air flow meter, injectors, throttle position sensor and plugs and after checking the plug wires we finally changed the leading coil and it improved to 7k but still would acts like it was hitting a rev limiter at 7k. Does anyone have any ideas?

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1989 Mazda rx-7 red
1986 951 silver/black
2001 supercrew white
Regional Executive Midsouth Region #66