b18c need help??

alright i have a 95 b81c1 in my 92 hatch and i havent had any problems until now. just recently i had my car parked for about two weeks waiting for the damn smog to go through. when it was finished smogging i took it out for a spin i tried to hit it going on to the freeway and for some reason when i hit 5 grand it starts bogging out or somethin. it runs great and pulls strong until 5k then it loses all power the rpm's still go up but doesnt pull.anyone had this problem or might know what it is any help would be appreciated thanks.i have heard it might by my throttle position sensor but not to sure on that anyone got an idea what it might be?