sparadic vtec

hey guys, ive got an ed6 with a b16a swap, all of a sudden here in the last couple days my vtec has been randomly not working, like sometimes it will work fine for a while then a couple minutes later it wont work, then it will crossover into vtec then randomly in and out of vtec rapidly, which makes things kinda jerky. no cel either, any ideas? ***sorry guys dont know why it posted 3 different threads***

wow, either no 1 knows, or this place has finally gone down the tubes