I press the gas and it can't pass 2000rpm , no matter light throttle or full throttle.
it looks like mis fire.but I have replaced a different leading coil , and doesn't make any change. this problem will happen when rain , is it grounding problem?
http://www2.hawaii.edu/~waiywong/VIDEO_006.mp4

 

is this happening in your s5 vehicle the 89-91 rx-7?? sounds like your OMP ( oil metering pump) has failed..... thowing the car into limp mode( wont let the car rev over about 2K ), is the check engine light coming on???

 

it is a s4 with s5 engine , I disable the OMP and run premix.