ff_drift_lol

so this car's been sitting for about 12 years and i got it running again. it was running perfect until my friend decided to rev to 5g a few times. now the idle sits there, fluctuates from 1k to 1.5k rpm, and when i stomp the gas instead of revving clean like it did, the motor doesn't do anything. sometimes it will get up to 2k. i removed the cats and welded custom exhaust, i understand the 6th ports may be stuck closed. will this cause my issue? i just got it running and i'm really bummed about it not running right. i just ordered coilovers for it and i wanna go have fun