I have a miss in my FP crx-si 1600. On track the car is down on power. No miss. No load in neutral the engine misses like it hitting the rev limiter at 3000rpm. The miss continues until you get the engine to about 4500. Then it seems ok.
The only thing that has been changed from ITA rules is the engine has a timing gear. It is set at the stock timing.
Possiblities: bad distributor, bad value springs ( they may hve 15 race weekends), ????
It isn't the ECU or the thorttle postition sensor.
This one has me stumped.