Adan

Alright, so i did a high rpm pass and my engine kind of hesitated. Since then, every time i give more than a quarter throttle i hear this really REALLY loud whine coming from my motor, it doesn't matter if im going 60 or 25, if im at less than a quarter throttle i hear no whine Also with this i have barely any power up steep hills, i can maintain 65 on flat roads, and low speed up the driveway no problem. I recently moved so i had to drive it about 450 miles and nothing new has seemed to develop with it. I live in a housing association and haven't had garage time yet to thoroughly inspect it but would greatly appreciate any ideas, since this is stumping me. Oh, and i drive a 1990 nissan 240sx with the ka24e motor