I got a 95 civic with a 95 Gsr in it. i have been having a issue with the car. my car lack of power when i hit at 3k rpm to 42k rpm. have no idea what it is. i change the alternator belt on it and had the alternator tested at auto zone and it pass. auto zone test battery and it was good and then i went up to get a second test at advance: they told me the battery was good. so i have no idea what's going on???? help

 

What ECU do you have? Are there any CELs?