im having the same problem as you and i cant figure it out. but the back of my vtec solenoid startin pouring oil out of everywhere n it does run shitty low and loss of vtec power when my vtec is suppose to engage. im tryin to figure it out too so if i can figure it out ill let u kno but i thought it was like water in my gas tank at first. this has been goin on for me bout 1 week n it never came across my mind that the solenoid could be stuck wide open. but im waiting fo info.